QuickStream PE - Manual Wavin Presiune

1 General system information 21.1 Full-bore flow system 21.2 System components 2

2 General installation instructions 32.1 Installation to Wavin system design 32.2 Pipe installation according to Wavin’s instructions 32.3 No slope in horizontal pipes 32.4 No siphons in the system 32.5 No obstructions in the pipe system 42.6 Only use 45° bends and 45° tees 42.7 Use only eccentric reducers / increasers 42.8 Only install expansion joints where provided in the design 52.9 Fix roof outlets and pipe system according to Wavin’s instructions 52.10 Do not connect gravity pipelines to the Wavin QuickStream system 62.11 Connect to a gravity system of sufficient capacity 62.12 Use prescribed pipe materials and pipe classes 6

3 Transport, storage and handling 73.1 Pipes 73.2 Fittings and accessories 7

4 Recommended sequence of installation 84.1 General installation recommendations 84.2 Sequence of installation 8

5 Installation of the roof outlets 95.1 General installation recommendations for roof outlets 95.2 Installation of roof outlets of an emergency overflow system 105.3 Types of roof outlets 115.4 Moisture barriers 215.5 Wavin QuickStream outlets on green roofs and parking decks 215.6 De-icing electrical heating elements 21

6 Jointing the pipe system 226.1 Cutting polyethylene pipes 226.2 Principles of heat fusing polyethylene pipes and fittings 226.3 Butt-welding 226.4 Electrofusion welding 246.5 Installation of expansion joints 26

7 Fixing the Wavin QuickStream PE system 277.1 Fixing the horizontal collector pipe 277.2 Fixing the roof outlet connecting pipe 307.3 Fixing the vertical downpipe 31

8 Special constructions 338.1 Pipe systems embedded in concrete 338.2 Fire protection 338.3 Thermal insulation 348.4 Acoustic plus thermal insulation 34

9 Connection to the gravity system 359.1 Discharge systems and capacity 359.2 Buried pipe systems 36

10 Commissioning & Maintenance 3711 Problem solving / technical support 38

Contents

Installation Manual Wavin QuickStream PEContents

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Wavin QuickStream PE

1.1 Full-bore flow system

Wavin QuickStream is a siphonic roof

drainage system. Whereas in conventional

gravity roof drainage systems gravity is

the only driving force for discharge, in

siphonic systems a gravity induced

vacuum will boost the drainage function.

This is achieved by preventing air being

sucked into the roof outlets during heavy

rainfall.

A specially designed roof outlet with an

air baffle and anti vortex vane only allows

the intake of water and prevents the

ingress of air, so allowing full-bore flow to

be achieved (see figures 1 & 2).

At full-bore flow, the difference in height

between the roof outlets and the

rainwater discharge level is utilised to

gain the energy that will increase the flow

velocity of the water in the pipework.

The combination of elimination of air in

the pipework and the increased flow

velocities, result in a considerable

increase in discharge capacity, leading

to a significant reduction of the pipe

dimensions.

Installation manualGeneral system information

1. General system information

Figure 3. System components of the Wavin QuickStream system.

Figure 1. Conventional roof outlet. Figure 2. Siphonic roof outlet.

1.2 System components

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Twelve basic rulesTo ensure proper functioning of the

Wavin QuickStream siphonic roof drainage

system, some general requirements related

to the design and installation of the system

must be met. Therefore please note the

following important rules:

1. Installation to Wavin system design

2. Pipe installation according to Wavin’s

instructions

3. No slope in horizontal pipes

4. No siphons in the system

5. No obstructions in the pipe system

6. Only use 45° Bends and 45° Tees

7. Use only Eccentric Reducers /

Increasers

8. Only install expansion joints where

provided in the design

9. Fix Roof Outlets and Pipe System

according to Wavin’s instructions

10. Do not connect gravity pipelines to

the Wavin QuickStream system

11. Connect to a gravity system of

sufficient capacity

12. Use prescribed pipe materials and

pipe classes

Figure 4. Example installation drawing.

2.1 Installation to Wavinsystem design

For each Wavin QuickStream system,

Wavin will make a site-specific hydraulic

design. Deviations from design might

impair design criteria and discharge

capacities.

Wavin uses dedicated software to design

Wavin QuickStream systems. This means

that the installation should be made exactly

according to the drawings supplied by

Wavin. Every deviation from design in

the installation might lead to an imbalance

of the system, resulting in incorrect

functioning of the system. All deviations

from the supplied drawings should

therefore be discussed in advance with

Wavin’s design department. Wavin shall

always send a written reply to such a

request.

2.2 Pipe installationaccording to Wavin’sinstructions

A good quality installation depends upon

proper handling, jointing and fixing. Good

workmanship is a key to success. In the

following chapters 3 to 9 guidance is

given to achieve the desired high level of

quality.

2.3 No slope in horizontalpipes

In horizontal pipes, no slope is required

to transport the water to the downpipe

since the system operates at high

velocities due to the energy head, which

is equal to the height of the building.

A small slope is neither beneficial nor

disadvantageous for the operation of the

system. For ease of installation, we

recommend to use no slope in the

horizontal pipes. If a slope in the horizontal

pipe is desirable to improve emptying of

the system after a rainfall, Wavin advises

to keep the slope below 1:200.

2.4 No siphons in thesystem

A negative slope or an upward placed

bend into the flow direction will create

a siphon. In siphonic systems this is not

allowed since during the start-up of

the system air might be entrapped,

preventing a full-bore flow.

Figure 5. No negative slope.

Figure 6. No upward placed bends.

Installation manualGeneral installation instructions

2. General installation instructions

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Wavin QuickStream PE3

2.5 No obstructions in thepipe system

All pipe ends should be checked and

freed from burrs. Burrs, dirt and other

obstructions might influence the proper

functioning of the system. Preferably,

electro-fusion couplers should be

applied. However, butt welds are also

allowed in the Wavin QuickStream

polyethylene pipe system.

Figure 7. Wrongly and properly cut pipe

ends.

2.6 Only use 45° bends and45° tees

Bends of 90° have a higher flow

resistance than two 45° bends. The

design of the system is based on using

two 45° bends instead of one 90° bend

unless specified differently. Installing 90°

bends is

consequently not allowed unless specified

by Wavin (see figure 8).

For the same reason only 45° Tees are

allowed instead of 90° Tees unless

specified by Wavin (see figure 9).

2.7 Use only eccentricreducers/increasers

Diameter changes in horizontal collecting

pipes must be made with eccentric

increasers. In order to accelerate the

evacuation of air, the topside of the

collector must remain on the same level

when an increaser in the flow direction

is installed.

Figure 8. Use only 45º bends, no 90º

bends.

Figure 9. Use only 45º Tees, no 90º Tees.

Figure 10. Use only eccentric increasers

in the flow direction with the

top side at the same level.

Reducers in the flow direction in horizontal

pipes are not allowed.


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Installation of eccentric reducers and

or increasers in vertical pipes should be

positioned with the level side facing the

wall. This allows for ease of installation,

particular when fixing rails and clamps

are used. Furthermore, it is more effective

during priming of the system (see figure 11).

2.8 Only install explansionjoints where providedin the design

Once installed, the Wavin QuickStream

system is subjected to temperature

changes and dynamic loads. Any

oscillation or vibration, originating from

partly filled pipes, must be effectively

damped. Wherever possible it is strongly

recommended to make all joints tensile

resistant.

In some countries, it is common practice

to provide each 5-meter pipe-length in

the vertical downpipe with an expansion

joint, while in other countries no expansion

joints are used and fixing clamps are

directly installed to the wall. It is not good

practice to install an expansion joint in

horizontal collector pipes. In those cases

where expansion joints are applied,

appropriate fixing is required. Guidance is

given in paragraph 7.3.

Wavin does not in general advise the

practice of absorbing axial displacements

by expansion loops or flexible legs in a

Wavin QuickStream PE system, unless

provided in the design proposal.

2.9 Fix roof outlets andpipe system accordingto Wavin’s instructions

One of the key elements in a Wavin

QuickStream system is the roof outlet.

Detailed points of attention are presented

in chapter 5. Improper or incomplete

installation might cause condensation

and/or leakages. In most Wavin

QuickStream systems, long horizontal

pipes will be installed below the roof. For

this part of the installation please follow

Wavin’s installation recommendations

mentioned in chapter 7. Wavin has

developed special brackets for an easy

and secure installation of the horizontal

collector pipes.


Figure 11. Install eccentric reducers in a vertical pipe with the level side facing the wall.

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2.10 Do not connect gravitypipelines to the WavinQuickStream system

Any open (gravity) connection to a Wavin

QuickStream system will allow the intake

of air and thus can severely impair the

siphonic function. Therefore, such

connections cannot be allowed in the

design. Also, attention should be paid on

not allowing extensions at a later date.

Extensions to the building will require its

own dedicated rainwater discharge

system.

2.11 Connect to a gravitysystem of sufficientcapacity

In order to prevent future flooding in case

the design rainfall actually takes place, the

installer should verify that the discharge

system, being either an open channel or

ventilated sewerage system, is capable of

discharging the design quantity. In case

the existing discharge system has a limited

capacity, contact should be sought with

the project manager or local authorities.

Guidance on maximum discharge

capacities is presented in Chapter 9.

2.12 Use prescribed pipematerials and pipeclasses

As Wavin QuickStream siphonic systems

are subjected to both under- and over

pressures, as well as axial loadings, only

Wavin’s recommended and quoted

pipework materials, fixing materials and

ancillaries should be used. In case of

deviations, advice must be sought from

Wavin’s technical team.


Figure 12. Only use Wavin recommended and quoted pipework.

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3.1 PipesPlease take note of following points of

attention:

1. Prevent damage during handling and

storage.

2. Store and transport pipes in bundles

as supplied

3. Store and transport loose pipes well

supported by using at least 5 supports

for a standard 5 meter pipe length.

4. Do not unload pipe bundles by sliding

each pipe over its length as this might

damage pipe ends. For the same

reason do not drag pipes across the

ground or other surfaces.

5. Prevent point loads in either storage

or lifting.

6. Use wide lifting belts.

7. Prevent excessive bending by using a

cross beam in lifting.

8. Do not store loose pipes over 1

meter in height.

9. Prevent pipes being exposed to

aggressive substances and high

temperatures.

10. Cover pipes in case of expected

long storage times, but allow for

ventilation.

When the above points have been

observed, installation will be easier and

the quality of the system will be optimal.

Working with dirty, bent and damaged

pipes is time consuming and affects

quality negatively.

Figure 13. Storage of pipes.

3.2 Fittings and accessoiresKeep fittings clean by:

- unpacking just before use,

- storage inside buildings or containers.

Store rubber ring fittings always in a

cool place, free from direct sunlight

exposure.

Figure 14. Unpack fittings just before use.

Installation manualTransport, storage and handling

3. Transport, storage and handling

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4.1 General installationrecommendations

Until the Wavin QuickStream system is

required to deal with any water discharges,

it is recommended to close the roof outlets

on the roof. Otherwise, contamination of

various kinds could penetrate into the

pipe system. Once the installation of the

roofing materials has been completed

and the whole roof is cleared from loose

rubble, the plugs can be removed from

the roof outlets.

It is strictly prohibited to sweep dirt from

the roof into the roof outlets. Particular

caution must be applied to remove all the

cement waste. Once mixed with water

cement could set permanently in the

pipework, thereby severely reducing the

discharge capacity.

If it is suspected that the system has

become contaminated during the building

process, it is strongly recommended to

clean the system before completion.

4.2 Sequence of installationIn most cases the horizontal collector pipe

will be installed underneath the roof. In this

situation the following sequence is advised:

Installation of the emergency overflow

systems to prevent potential problems

of water on the roof and inside the

building.

Installation of the Wavin QuickStream

roof outlets in the roof construction at

the positions according to the design.

Follow the installation instructions as

supplied with each product.

Plug off the outlet to prevent

contamination of the system and

water entering the system during the

construction works.

Installation of the roofing material and

fixing the outlet in the roofing material.

Installation of the hanging rails and

brackets according to the design

(see chapter 7).

Installation of the horizontal collector

pipe and the roof outlet connecting

pipes and then the vertical pipework

top-down according to the supplied

drawings. Use fix point brackets

where indicated in the design.

Check the bracketing system for

fixing and/or sliding.

Install discharge points.

Check if discharge can take place

unhindered and with sufficient

capacity (see table in chapter 9).

Commission pipework by pressure

testing (see chapter 10).

Clean roof surface.

Un-plug Wavin QuickStream roof

outlets.

Dismantle temporary emergency

overflows.

Pipe sections located in either floor

and/or walls must be pressure tested

prior to the casting of concrete. In order

to prevent any ingress of mortar into the

system, these pipe sections must be

capped-off thoroughly. Open pipe ends

must be well protected against possible

damage by using PE caps.

Installation manualRecommended sequence of installation

4. Recommended sequence of installation

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5.1 General installationrecommendations forroof outlets

One of the key components in a siphonic

roof drainage system are the roof outlets.

The roof outlets should be located exactly

according to Wavin’s supplied Roof

Outlet Plan.

All roof outlets need to be placed at the

lowest points of the roof but at least 0.5

meters from the eaves. If the eave roof

level is lower than the level of the roof

outlets the roof surface between the roof

outlets and the eaves needs to be filled-up

to realise a slope of 0 to 3 degrees

toward the outlets. All low points of the

roof must have an outlet.

All Wavin QuickStream roof outlets have

air baffles to prevent air entrainment into

the pipe system. Any removal of baffles

or cleaning caps will reduce the drainage

capacity tremendously.

In case insulation is required, either

existing insulation of the roof can be used

or special insulation blocks that can be

sourced from Wavin.

In specific climatic situations, it may be

required to install additional de-icing

heating on the roof outlet (see paragraph

5.6)

In all cases, movement and vibrations

must be prevented from being transferred

to the tail pipes of the roof outlets by

effective fixing. Guidance is given in

chapter 7.

Each delivery of roof outlets is provided

with detailed installation instructions

related to type and size. Below the most

important general steps are noted.

Check the correct position of the flat

sealing ring at the end of the screw

thread of the roof outlet connector.

Screw the roof outlet connector to

the threaded outlet. Firmly tightening

by hand will be sufficient to achieve

a watertight connection. In case

de-icing heating is required, place the

heating element prior to screwing on

the roof outlet connector. The Wavin

QSPE 75 roof outlet has a 75 mm

outlet pipe so no additional roof outlet

connector is required.

Cut a piece from the insulation where

the roof outlet will be positioned (note:

size of insulation blocks might differ!).

Use the insulation block as a gauge.

Place the insulation block in the free

space made in the roof insulation.

The insulation block may be positioned

about 10 mm lower than the

surrounding insulation but in any case

not higher. If required some insulation

material may be added below the

insulation block to achieve the right

height.

Dismantle the top part (clamping

ring / leaf separator) and store all

dismantled parts properly for later

reassembly.

Install the roof outlet.

Clamping type roof outlet

If required, the roof outlet can be

fixed into the roof by using 4 screws

or nails. The sealing with the roof

membrane is achieved by pressing

the membrane between the clamping

ring and the sump pan. Carefully

check on correct positioning of the

sealing rings (if present) and the

absence of dirt in the sealing area.

If a joint of two roof membranes is

located at the position of the roof

outlet, a square piece of roof

membrane of size 0.6 to 1 m should

first be clamped into the outlet. At the

location of the outlet a piece of the

roof membrane smaller than the

square fixed into the roof outlet needs

to be cut out. Finally the roof

membrane fixed in the outlet can be

fixed to the roof membrane positioned

on the roof.

Bitumen type roof outlet

Place the roof outlet on the bitumen

sub-layer if present. If required, the

roof outlet can be fixed to the roof by

using 4 screws or nails. Degrease

the stainless steel parts using an

appropriate solvent. Heat weld the

bitumen top layer to the stainless

steel plate of the roof outlet. Take

care to use sufficient heat to establish

a bond between the top layer and the

sub layer via the holes in the plate of

the roof outlet.

Installation manualInstallation of the roof outlets

5. Installation of the roof outlets

Figure 15. Location of the roof outlet at least 0.5 m from the eaves (0-3 degrees slope).

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Gutter type roof outlet

The gutter type of roof outlet will be

fixed to the metal gutter by use of a

backing flange and bolts.

Sealing is performed by rubber

gaskets, on both surfaces of the gutter

compressed between the backing

flange and the outlet part.

The gutter version roof outlet with

metal sheets can be directly welded

to the gutter material.

Place the plastic cap provided with

the outlet firmly in the outlet to prevent

dirt entering the system during further

construction works.

Make the connection to the horizontal

collector pipe according to the design.

Clean the whole roof properly prior to

commissioning of the system.

Remove the caps from each roof

outlet and reassemble the top part.

Nuts or screws should be tightened

hand-tight. Nuts should be

subsequently tightened with a torque

spanner, set on 5 to 10 Nm.

Figure 16. Wavin emergency overflow

ring to convert a standard

outlet into an emergency

overflow outlet.

5.2 Installation of roof outletsof an emergencyoverflow system

When a Wavin QuickStream siphonic

system has been designed for an

emergency overflow system the following

installation rules should be considered.

A standard Wavin QuickStream roof

outlet can be installed at the required

higher level by using, for example, an

insulation block or a ring of the

required height placed around the

outlet. Wavin has special plastic rings

for its QSMP 75 and QSPE 75 outlet,

which are easy to cut at the correct

height by using the guidelines on the

outside of the ring (see figure 16).

The emergency overflow outlet

should preferably not be located at

the lowest roof level, in order to avoid

pollution and to secure a free flow of

water between the roof outlets of the

standard Wavin QuickStream rainwater

system.

The designer of the roof or the building

designer should supply the height of

the inflow of the emergency overflow

system. Wavin will supply the minimum

level of the emergency overflow system

when located next to the Wavin

QuickStream roof outlets to secure a

proper functioning of the Wavin

QuickStream system. Usually the

height is approx. 30 to 55 mm higher

than the roof outlets of the standard

rainwater system.

The discharge of the emergency

overflow pipe system should be

above ground level at a visible location.


Figure 17. Figure roof outlet in slope of the roof and placed at an insulation block.

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5.3 Types of roof outletsWavin QuickStream roof outlets are

available in different materials.

Additionally there are three different

constructions for sealing to different

roofing materials and gutters.

Type 1: Clamping type

Compressing the roofing membrane

between two flanges performs the

sealing. This outlet type can be directly

installed on the most common roofing

membranes such as PVC, EPDM and

bitumen.

Type 2: Bitumen type

This type is supplied with a stainless

steel flange on which the bitumen roofing

membrane can be heat welded directly.

Type 3: Gutter type

These outlets are designed for installation

in metal gutters. Sealing is performed by

EPDM rubber gaskets, on both surfaces

of the gutter compressed between the

backing flange and the outlet part.

Upon request, a gutter type outlet can be

supplied with a contact sheet of the

same metal as the gutter, so that the

outlet can be welded / soldered into the

gutter.

A wide range of accessories is available

for specific situations like:

Foamed polystyrene insulation blocks

Moisture barriers

De-icing electric heating elements

Straight threaded roof outlet

connectors and 90 degree bended

connectors.

Detailed assembling instructions are

supplied with each Wavin QuickStream

outlet.


Table 1. Overview of Wavin QuickStream roof outlets: A = Available.

Diameter rangeRoof outlet type vertical tail pipe

Product Outlet Outlet Clamp Bitumen Guttercode materials connection version version version Min. OD Max. OD

Siluminium /

QS 75 stainless 21/2” A A A 40 mm 90 mm

steel

Plastic /

QSMP 75 stainless 21/2” A A A 40 mm 90 mm

steel

QSPE 75 Plastics / PE PE 75 mm A A A 40 mm 90 mm

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5.3.1 Wavin QSPE 75,Plastic roof outlet –clamp version

The Wavin QuickStream universal plastic

roof outlet QSPE 75 has a bottom part

made from PE, enabling direct welding to

the PE-pipe system using an electrofusion

socket. This outlet has an inspection cap

with a bayonet catch to enable a quick

and easy inspection of the pipe system.

The integrated clamp flange makes it

possible to fasten various types of roofing

membranes to the outlet.

The outlet is always supplied including an

insulation block. For roofs that require a

damp or moisture barrier, a version

including a moisture barrier can be

supplied.


Figure 19. Installation example Wavin QSPE 75 clamp version.

Figure 18. Wavin QSPE 75.

The Wavin QuickStream universal plastic

roof outlet QSPE 75 consists of the

following components:

1. Inspection Cap

2. Top Part

3. Clamping ring and Leaf separator

4. Rubber Seal

5. Sump pan and outlet (PE)

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5.3.2 Wavin QSPE 75,Plastic roof outlet –gutter / bitumenversion

The Wavin QuickStream QSPE75 roof

outlet used for a heat bonded installation

on bitumen roofs and installation in metal

gutters is supplied with a special metal

contact sheet. This contact sheet is

clamped between the bottom part and

clamping ring.

The roof outlet consists of the following

components:

1. Inspection Cap

2. Top Part


4. Metal contact sheet

5. Rubber Seal

6. Sump pan and outlet (PE)

When installing the outlet in a metal gutter,

the metal sheet should be made of the

same metal as the gutter, so that the

outlet can be welded / soldered into the

gutter and electrolytic or bi-metal corrosion

can be avoided. Figure 20. Wavin QSPE 75 with metal sheet.

Figure 21. Installation example Wavin QSPE 75 in a gutter.

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For heat-welded bonding with a bitumen

roof membrane, a stainless steel contact

sheet will be used. The bitumen top layer

should be cut out and heat welded up to

approx. 100 mm from the outside of the

outlet. During the heat welding, the top

parts of the outlet need to be dismantled

and stored properly.

Figure 22. Installation example Wavin QSPE 75 with a stainless steel contact sheet on a bitumen roof.

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5.3.3 Wavin QS 75,Metal roof outlet –clamp version

The Wavin QuickStream QS75 clamp

version roof outlet consists of the


1. Leaf guard / air baffle (epoxy coated

siluminium)

2. Clamping ring (stainless steel)

3. Sump pan/outlet flange (stainless

steel)

4. Roof outlet connector with sealing ring

(supplied in a separate packaging)


Figure 24. Installation example Wavin QS 75 clamp version for PVC, EPDM or bitumen

roof membranes.

Figure 23. Wavin QS 75 clamp version.

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5.3.4 Wavin QS 75,Metal roof outlet –bitumen version

The Wavin QuickStream QS75 bitumen

version roof outlet consists of the



siluminium)

2. Sump pan/outlet flange (stainless

steel)



Figure 26. Installation example Wavin QS 75 bitumen version.

Figure 25. Wavin QS 75 bitumen version.

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5.3.5 Wavin QS 75,Metal roof outlet –gutter version

The Wavin QuickStream QS75 gutter

version roof outlet consists of the following

components:


siluminium)

2. Sump pan/outlet flange (stainless steel)

3. EPDM gaskets & aluminium backing

flange




Figure 28. Installation example Wavin QS 75 gutter version with backing flange and EPDM gaskets.

If possible deform the gutter around the outlet downwards by 3 to 4 mm.

Figure 27. Wavin QS 75 gutter version.

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5.3.6 Wavin QSMP 75,Metal-plastic roofoutlet - clamp /bitumen version

The Wavin QuickStream QSMP 75 clamp

/ bitumen version roof outlet can be used

to clamp PVC, EPDM or bitumen roof

membranes or for heat welding bitumen

roof membranes directly to the stainless

steel bottom part. This roof outlet

consists of the following components:

1. Inspection cap

2. Top part


4. Rubber seal

5. Sump pan



Figure 30. Installation example Wavin QSMP 75 clamp version for PVC, EPDM or

bitumen roof membranes.

Figure 29. Wavin QSMP 75 clamp / bitumen version.

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When the bitumen roof membrane is

directly heat welded to the Wavin QSMP

75, no rubber gasket should be installed

between the bottom part of the outlet and

the bitumen roof foil.



Figure 31. Installation example Wavin QSMP 75 heat welded bitumen roof foil.

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5.3.7 Wavin QSMP 75,Metal-plastic roofoutlet - gutter version

The Wavin QuickStream QSMP 75 gutter

version roof outlet is supplied with a

backing flange and two EPDM rubber

gaskets. It consists of the following

components:

1. Inspection cap

2. Top part


4. Sump pan

5. EPDM gaskets & stainless steel

backing flange




Figure 33. Installation example Wavin QSMP 75 gutter version with backing flange and EPDM gaskets. If possible, deform the gutter

around the outlet downwards by 3 to 4 mm.

Figure 32. Wavin QSMP 75 gutter version

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5.4 Moisture barriersOn request, Wavin can supply moisture

barrier flanges that will secure a vapour

tight seal between the tail pipe and the foil

in the roof, which is used as a moisture

barrier. A rubber ring will secure the

vapour tight seal with the tail pipe while

the foil will be clamped between the

flange parts.

Figure 34 and 35. Moisture barriers.

5.5 Wavin QuickStreamoutlets on green roofsand parking decks

Wavin has developed special perforated

shafts DN 315 wrapped with geotextile

that can be placed around standard

(QuickStream) roof outlets. The shaft can

be easily cut to the required height with a

minimum height of 200 mm. The cover

should be positioned not higher than the

adjacent surface. Depending on the load

situation, various covers with gratings can

be supplied. The maximum load on the

shaft should not exceed 15000 N. Prior

to installation, the installer needs to check

whether the roof construction and the

roof foil can withstand the loads to be

transferred to these parts of the roof

construction. For parking decks a similar

construction can be supplied. Please

consult Wavin for further details.

5.6 De-icing electricalheating elements

Wavin QuickStream roof outlets can be

provided with an automatic electric heating

system. A heating system prevents

blockage of the outlet in case of ice-rain,

freezing melt water or snow.

A built in temperature probe will

automatically switch-on the heating plate

when ambient temperature drops below

+ 4 °C.

The heating element (see figure 37) is

placed between the external surface of

the sump pan and the thermal insulation

pack. See also chapter 8.3; “Thermal

insulation”.

Each heating element consumes 3 Watt

in stand-by mode and takes 18 Watt

when heating. Voltage is single phase

230 VAC.

Figure 37. Heating element.


Figure 36. Shaft and cover for installation on a green roof.

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6.1 Cutting polyethylenepipes

Best practice in cutting PE pipes is to use

a rotary pipe cutter designed for plastic

pipes. In case a saw is used, ensure that

the cut is square to the pipe axis. This

can easily be achieved by using a pipe

clamp as sawing guide. Always remove

burrs and flashes!

6.2 Principles of heatfusing polyethylenepipes and fittings

The Wavin QuickStream range contains

pipes, spigot fittings and electrofusion

sockets. Pipes and fittings (both electro

fusion couplers and spigot fittings) are

provided with external marking ribs or

marking stripes enabling easy alignment

particularly in pre-fabrication.

Note: polyethylene pipes and fittings

cannot be joined using solvent cement!

For correct heat fusion of polyethylene,

following basic requirements must be met

in order to obtain good quality joints.

1. Sufficient heat

2. Sufficient pressure

3. Sufficient welding & cooling time

4. “Clean to clean” material

In the two most common applied welding

techniques, electrofusion and butt-welding,

these parameters are dependent on the

design of the electrofusion socket and/or

in the welding procedure.

6.3 Butt-weldingButt-welding is a very economical jointing

technique. Correctly made butt-welds

reach the strength of the pipe. Well-trained

personnel are recommended for making

butt-welds.

In butt welding, two pipe ends, two fitting

ends or a pipe end and a fitting end are

bonded by melting the circular pipe faces

simultaneous and pressing these together.

Butt-welding can only be performed using

a butt-welding machine.

The butt-welding procedure

incorporates the following 15 steps:

1. Check environmental conditions.

When the outside temperature is below

5 ºC and/or during rainy and windy

conditions, special precautionary

measure have to be taken to ensure

dry and sufficiently warm welding

conditions.

2. Check welding machine is in good

functional order.

At least the following issues should

be checked: temperature, alignment,

play of the moving parts, smooth

movement of the moving parts,

electrical connections, cutting

machining plane (sharpness).

Figure 38.

3. Clean heater plate with PE cleaner

and a soft cloth.

Prevent any damage of the Teflon

coating.

Figure 39.

4. Check temperature heater plate

on 210 ºC.

Figure 40.

5. Cut pipe to required length.

Note: take into account that in the

welding process a few millimetres

pipe will be consumed. Best practice

is to use a rotary pipe cutter. The pipe

ends are then square and free from

burrs. If a saw is used, it is advised to

use a spare clamp as a sawing guide.

Such cut pipe ends must be de-burred

before placing in the welding machine.

Figure 41.

6. Clamp both pipe-ends in the

welding machine and ensure

correct alignment.

Eliminate any bending forces if present.

Figure 42.

Installation manualJointing the pipe system

6. Jointing the pipe system

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7. Trim both pipe-ends using the

planer.

Keep planer running while slowly

reducing pressure. Do not stop

planer when still in contact with pipe

ends in order to prevent uneven

surfaces.

Figure 43.

8. Check that pipe ends are matching.

If not correct either re-clamp pipes

(alignment) and/or repeat trimming.

After re-clamping it is necessary to

trim the pipe-end again with a planer.

Figure 44.

9. Insert heater plate and press both

pipe ends during a few seconds

with a higher force on the plate for

ensuring full contact.

Figure 45.

10. Reduce force until nearly zero,

assuring contact with heater plate

so that heat is soaked into both

pipe ends.

11. Maintain heat soaking till a bead is

formed of approximate 1 mm for

diameters 40 up to 200 and 1.5mm

for diameters 250 and 315mm.

Use the figures mentioned in table 2

as guidance for the heat soaking

duration.

12. After heating time is elapsed,

quickly open the welding machine,

remove the heater plate and close

immediately.

This part of the welding operation

must be kept as short as possible in

order not to loose too much heat!

Figure 46.

13. Slowly apply welding force and

maintain for required cooling time

according to table 2a.

14. Inspect weld bead for evenness.

Uneven weld beads indicate incorrect

alignment or out of roundness. Large

weld beads could be caused by either

too high a heater temperature and/or

too high a welding force. A small

weld bead could be caused by a too

low a heater temperature and/or too

low a welding force. In both cases

the weld should be rejected due to

reduced strength.

Figure 47.

15. Remove welded joint from the

welding machine after cooling time

is elapsed.

The joint need to be kept free from

any loads within 5 minutes after the

cooling time is elepsed.

If the above steps are followed correctly,

the above mentioned four basic

requirements should be fully met.

Diameter 40 50-110 125 160 200 250 315

Time [s] 30 40 60 80 100 140 170

Table 2. Guidance of the heat soaking duration (in seconds) for butt-welding.

Diameter 40-75 90 110 125 160 200 250 315

Time [s] 60 70 80 100 120 200 280 340

Table 2a. Guidance of the minimum cooling time (in seconds) for butt-welding at 20º C.

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6.4 Electrofusion weldingElectrofusion sockets are provided with

an electric resistance wiring embedded in

the internal surface. When connected to

an electric power source, heat is supplied

directly in the fusion zones. During the

melting of polyethylene, its volume

increases. This expansion creates the

necessary welding pressure. The Wavin

welding equipment automatically doses the

exact required energy for making a good

joint. There are two welding machines:

one for the sizes 40-160 and one for the

dimensions 200, 250 and 315 mm.

In order to meet the four basic

requirements for making a sound

joint, special attention should be paid

on the following 12 points:

1. Check environmental conditions.

When the outside temperature is

below 5 ºC and/or during rainy and

windy conditions special precautionary

measure have to be taken to secure

dry and sufficient warm welding

conditions.

2. Secure proper power conditions.

Check the stability and the height of

the voltage especially when using a

generator or using long cables.

When the voltage is not stable,

connecting for example a

construction lamp to the generator

might solve the stabilisation problem.

3. Only use correct Wavin welding

equipment.

Figure 48. WaviDuo electrofusion

equipment.

4. Always cut pipe-ends square!

If this is not the case, melt cannot be

kept encapsulated between pipe end

and socket, resulting in a loss of

melt-pressure! Best practice is to use

a rotary pipe cutter (see photo). The

pipe ends are then square and free

from burrs. If a saw is used, it is

advised to use a spare clamp as a

sawing guide. Such cut pipe ends

must be de-burred before inserting

the pipe end in the electrofusion

socket.

Figure 49. Preferably use a pipe clamp.

5. Clean and de-burr pipe ends

Figure 50. De-burr pipes when a saw is

used.

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6. Chafe pipe ends over its insertion

depth using a clean emery cloth

(-lint) of a roughness 40 or lower or

a dedicated PE pipe scraper.

Figure 51. Chafe pipe end with emery lint

of roughness 40 or lower.

Figure 52. Clean pipe end with

PE cleaner.

Figure 53. Scrape pipe end with hand

scraper.


7. Always insert pipe ends till the

internal register in the socket, so

that full insertion is reached.

Mark the insertion depth on the pipe

ends so that any slippage can be

detected in time. In case the internal

register (pipe stops) have been cut

away so that the electrofusion socket

can be used as a sliding socket,

correct marking of the insertion depth

is essential. Improperly inserted pipe

ends also lead to a loss of melt

pressure.

Figure 54. Mark insertion depth.

8. Clean internal socket surfaces

with a clean cloth and Wavin PE

cleaner.

Ensure proper drying of cleaner

before assembling joint.

Figure 55. Clean internal socket with PE

cleaner.

9. In case pipe ends are too oval,

re-rounding is required by using a

temporary pipe clamp, fixed close

to the socket.

This temporary clamp can be

removed after elapsed cooling time.

Figure 56. Install a temporary pipe clamp

for re-rounding close to the

socket.

10. Always prevent any loading or

bending on a joint during welding

and subsequently cooling.

Ensure that installed pipe sections are

properly fixed before starting to make

the electrofusion joints.

Figure 57. Proper fixing before welding.

In case the jointing procedure is

interrupted, first correct the cause of

the interruption, then allow the joint to

cool completely before re-welding.

11. Inspect welded joint for correct

alignment, insertion depths and

weld indicators.

The weld indicators indicate that the

joint has been energized; they are not

linked to weld quality, as quality is

only reached by following above

steps and requirements.

Figure 58. Inspect insertion depth and

weld indicators.

12. Demount temporary pipe clamp

(if used).

Figure 59. Demount temporary pipe

clamp.

Specific points of attention in

electrofusion operation:

1. Pipe ends must be cut square.

2. Pipe ends must be chafed properly.

3. Pipe ends, electrofusion sockets and

welding equipment must have same

ambient temperature before starting

welding (if not, energy might be too

high or too low).

4. Joint must not be subjected to

axial- and bending loadings during

welding and cooling.

5. Pipes and fittings need to be

completely dry.


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Pipe diameter

≤ 50 63 75 90 110 125 160 200 250 315Ambient temperature Insertion depth in [mm] for pipe length of 6 meter

- 10° C 65 70 70 80 85 90 100 140 140 140

0° C 75 80 80 90 95 100 110 150 150 150

+ 10° C 85 90 90 100 105 110 120 160 160 160

+ 20° C 95 100 100 110 115 120 130 170 170 170

+ 30° C 105 110 110 120 125 130 140 180 180 180

Table 3. Insertion depth of pipes into an expansion socket, max. pipe length 6 meter.

4. Apply silicone oil on rubber seal

and sparsely on spigot end.

Figure 63.

Figure 64.

5. Install pipe and fix with a

fixed-point bracket on the socket

side and sliding brackets over the

rest of the pipe length.

Figure 65.

6. Check depth of insertion.

For a good functioning of the expansion

joints, follow these instructions:

1. Prepare positions of fix- and

sliding brackets.

Expansion sockets must always be

configured as a fixed-point. That

means that all other fixing points

must be sliding brackets

(see figure 87).

2. Chamfer pipe end.

Chamfer angle should be

approximately 15° and chamfering

length should be minimum 4 mm.

Figure 61.

3. Mark insertion depth.

Use the insertion depth for the

ambient temperature during

installation according to the values

mentioned in table 3.

Figure 62.

6.5 Installation ofexpansion joints

Expansion joints are push-fit sockets with

a rubber seal.

Expansion and contraction in the pipe

system is absorbed by axial displacements

in the sockets. Normally expansion joints

are mostly located in the vertical

downpipes. In special circumstances, if

no other options remain to absorb

thermally induced displacements,

expansion joints can be positioned in

horizontal collector pipes.

Figure 60. Installation of an expansion joint.

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7.1 Fixing the horizontalcollector pipe

A controlled absorption of thermal axial

pipe stresses in rigid suspension systems

by making use of galvanised steel rails is

most commonly applied in PE siphonic

rainwater discharge systems.

The benefits are ease of installation and

no unexpected displacements. The

thermally induced axial loads are

completely absorbed by the suspension

and bracketing system. Once the

suspension rails have been installed, pipe

segments can then easily be placed in

the brackets. In-lays can be placed in the

brackets to create a strong and cost

effective fix of the pipework against axial

displacement.

All Wavin QuickStream brackets are

designed to enable fast and easy placing

of pipe segments and additional closing

of the brackets. See picture 68-82.

Installation of the steel railsThe Wavin QuickStream system

compromises three types of suspension

rails:

1. Wavin QuickStream rail 30 x 30 mm

for pipes 40 – 160 mm


for pipe 200 – 250 mm


for pipe diameter 315 mm

Special attention needs to be paid to

the following 5 points:

1. Wavin rail connectors.

The suspension rails must be mutually

connected with the specific Wavin

QuickStream rail connectors that can

transfer thermally induced axial loads

from one rail to the next one. The rail

connector for the rail 30 x 45 mm can

also be used for connecting a 30 x 30

mm rail to a 30 x 45 mm rail.

It is not possible to make a connection

between a 30 x 45 mm rail and a 41 x 62

mm rail, or between a 30 x 30 mm rail

and a 41 x 62 mm rail. In cases where it

is not possible to use a rail connector,

then the extreme brackets on each rail

must be of the fixed type. This is only the

case at bends and at a diameter change

between 315 mm and 250 mm pipe size.

2. Install the bottom side of all types

of rail on the same level.

The bottom side of the different types of

rail always needs to be installed on the

same level. Special attention to the height

of the rail needs to be paid when

installation of the rail is started at the

upstream side of the horizontal collector

pipe and when the pipe size at the

downstream side of the horizontal

collector pipe is larger than 160 mm. In

this situation, the 30 x 30 rail needs to be

installed 15 or 30 mm lower to allow a

bottom level connection to a 30 x 45 or a

41 x 62 mm rail. When the rail is fixed at

the top side to e.g. steel beams, a 30 x

15 or a 30 x 30 rail can be fixed between

the 30 x 30 rail and the steel beam to

adjust the height of the 30 x 30 rail to the

height of the 30 x 45 or 41 x 62 mm rail.

3. Maximum intermediate distances

of the suspension elements.

All Wavin QuickStream rail types 30 x 30,

30 x 45 and 41 x 62 should be suspen-

ded to the roof construction at a maxi-

mum distance of 2 meters between the

suspension elements, taking into account

the weight of a fully filled pipe, the weight

of the suspension rail and the load ability

of the roof construction.

4. Anchoring of the steel rails.

All rails can be suspended relatively easily

using threaded rods to the roof. The

length of the threaded rods is of no

importance as these only bear the

weight of the pipe, pipe clamps and rail

construction. Wavin recommends

anchoring the steel rails to the roof every

12 meters and at every change of

direction. The anchors need to be fixed

to the wall structure or alternatively

installed lateral to the rails and approx.

45º to the roof.

5. Check weight limitations, which

can be suspended to the (roof)

construction.

Care should be taken that the roof

constructions have sufficient strength to

bear the whole piping construction. The

total weight per meter of a fully filled pipe

and the suspension system can be taken

from table 4.

When the rail system is suspended every

2.5 meters, the design strength of each

suspension point to the roof should be at

least 2.5 times the total weight/m

according to table 4. The weight of

insulation blankets can be found in

chapter 8.4.


Installation manualFixing the Wavin QuickStream PE system

7. Fixing the Wavin QuickStream PE system

Pipe diameter [mm] 40 50 56 63 75 90 110 125 160 200 250 315

Weight/m [kg/m] 3.4 4.2 4.7 5.4 6.7 8.8 12.1 15.0 23.3 35.8 54.6 86.9

Table 4. Weight of the pipe including suspension and 100% filled with water.

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Installation of the bracketsTo avoid potential sagging of the pipes,

the horizontal maximum supporting /

bracketing distances from table 5 should

be applied in a Wavin QuickStream PE

pipe system.

The photos below show the installation

of the rail suspension element, the rail

connector and a fixed-point bracket.

1. Install suspension element and fix

the rail.

Install the suspension element at the right

height using a M10 threaded rod.

Figure 66.

Fix the rail into the suspension element

and fasten the two screws.

Figure 67.

2. Installation of the rail connector.

Insert the rail connector approx. half way

into the rail.

Figure 68.

Fix the next rail to the rail connector and

fasten the 4 screws (it is not required to

place the rails against the previous one).

Figure 69.

3. Fix the bracket to the rail.

Click the bracket at the right location on

the rail (see table bracketing distance).

Figure 70.

Fix the bracket to the rail by clicking the

front part into the rail and fasten the screw.

Figure 71.

4. Click fixed-point inlay in the bracket

and insert the pipe.

Click one stainless steel inlay into the back

part of the bracket

Figure 72.

Click the PE pipe into bracket. The pipe

will not fall out.

Figure 73.

5. Close bracket and fasten the screw.

Click the front part of the bracket into the

hook and fasten the screw.

Figure 74.

Installation completed.

Figure 75.

PE pipe diameter [mm] 40-75 90 110 125 160 200-315

Maximum bracketing0.8 0.9 1.1 1.25 1.6 2.0

distance [m]

Table 5. Maximum horizontal bracketing distances in meters.

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The photos below show the installation of

the sliding bracket.

1. Click the sliding bracket on the rail

and put in the pipe.

Click the sliding bracket at the right

location on the rail (see table bracketing

distances).

Figure 78.

Click the PE pipe into the bracket.

The PE pipe will not fall out.

Figure 79.

2. Fasten the screws.

Click the front part of the bracket into the

hook and fasten the bottom screw.

Figure 80.

Fasten the upper screw.

Figure 81.

3. Installation completed.

Figure 82.

Location of the fixed-points

As a minimum, a fixed-point bracket

must be placed on the largest side of

every increaser / reducer. If a Tee piece

is located at an increaser, then the

fixed-point brackets can be situated

directly next to the Tee piece.

Fixed-point brackets should also be

installed directly before and after a change

in direction, e.g. at a bend and at each

interruption of the rails. The maximum

distance between two fixed-point brackets

may not exceed 10 meters. The fixed

points need to be located within a maxi-

mum distance of 0.3 meters from a sus-

pesion element.

Figure 76.

Location of fixed-point brackets just

before and after a bend (top view).


Figure 83. Location of fixed-point brackets in the horizontal collector pipe.

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Figure 77. Fixed point within 0.3 meters

from a suspension element.


Figure 85. Install horizontal support brackets if the horizontal distance between roof

outlet and collector pipe is 0.8 to 1.2 meters.

Figure 84. No horizontal support brackets if the horizontal tail pipe <0.8 meters.

No vertical brackets if the vertical tail pipe < 1.2 meters

7.2 Fixing the roof outletconnecting pipe

To prevent the roof outlet being pushed

out of the roof due to thermal expansion

of the tail pipe, the first bracket should be

positioned no less than 0.5 meters from

the outlet. Under no circumstances

should sagging be allowed in the

horizontal part of the tail pipe. The

maximum vertical pipe length directly

below the roof outlet is 1.2 meters.

Also in this pipe section, no bracket is

allowed. The vertical tail pipe needs to be

installed without tensions. Under no

circumstances, bending of this part is

allowed.

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7.3 Fixing the verticaldownpipe

Rigid fixing of the vertical downpipe

The vertical downpipes can be fixed by

the use of Wavin QuickStream rails in a

similar way as with the horizontal collector

pipes. Most commonly however, the

pipework can be installed directly on the

wall structure so that for this part of the

system the suspension rails can be

omitted. This is why it is standard in the

quotation to include fixed-point brackets

enabling a fix to a wall instead of using

rails. A fixed-point needs to be positioned

at the top end of the vertical downpipe,

as close as possible to the elbows.

Furthermore, fixed-points also need to be

installed at a maximum spacing of every

10 meters. Be aware of expansion and

contractions loads transferred to the wall

structure. In table 6 guidance is given for

the thickness of the threaded metal pipe

for the fixed-points in relation to the

distance to the wall and Wavin

QuickStream pipe diameter.

Figure 86. Ridid fixing of the vertical

downpipe.

Installation manualFixing the Wavin QuickStream PE System

Distance pipe Pipe diameter [mm]to wall

[mm] ≤ 90 110 125 160 200 250 315

50 1/2” 1/2” 1/2” - - - -

100 1/2” 1/2” 1” 1” 1” 1” 1”

Table 6. Minimum diameter of the threaded metal pipes for the fixed-points.

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Table 7. Maximum bracketing distance (in meters) for the vertical downpipe.

PE Pipe diameter [mm] 40 50 56 63 75 90 110 125 160 200 250 315

Maximum bracketing0.9 0.9 0.9 0.9 1.2 1.4 1.7 1.9 2.4 3.0 3.0 3.0distance [m]

Bracketing distance in the vertical

downpipe

For vertical installed pipes following

maximum bracketing distances must be

applied.


Flexible fixing of the vertical

downpipe

Most commonly in the vertical downpipes

expansion sockets are used. As there will

be always some friction in the sealing

system of an expansion joint, it is absolute

required to anchor the expansion socket

(see figure 87). At the top of a vertical

downpipe, always a fixed-point bracket

should be installed. All other brackets

should be “sliding brackets”.

Fixed-points can either be created by

placing an electrofusion socket

underneath the bracket fixing the

expansion socket (see figure 87) or by use

of a stainless steel insert in the bracket.

FIgure 87. Fixing of expansion sockets.

Figure 88. Location of fixed-points in the vertical downpipe.

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Distance pipe Pipe diameter [mm]

to wall

[mm] ≤ 90 110 125 160 200 250 315

50 1/2” 1/2” 1/2” 1/2” - - -

100 1/2” 1/2” 1/2” 1” 1” 1” 1”

Table 8. Minimum diameter of the threaded metal pipes for fixed-points when using expansion sockets.

Table 9. Maximum bracketing distance (in meters) for the vertical downpipe.

PE Pipe diameter [mm] 40 50 56 63 75 90 110 125 160 200 250 315

Maximum bracketing0.9 0.9 0.9 0.9 1.2 1.4 1.7 1.9 2.4 3.0 3.0 3.0distance [m]

Bracketing distance in the vertical

downpipe

For vertical installed pipes following

maximum bracketing distances must be

applied.

In order to prevent buoyancy during

concrete casting, the pipework must

be positioned and fixed properly.

Pipework, especially in vertical walls,

can be subjected to high external

pressures during concrete casting and

curing. It is strongly recommended to

fill these pipes with water in order to

prevent collapse and/or local buoyancy.

To avoid buckling of the class SDR

26 Wavin QuickStream PE pipes, the

maximum concrete height above the

pipe should not exceed 3.2 meters.

When the pipe is filled with water

equal to the concrete casting level,

the maximum concrete height can be

increased to 5.3 meters. These

maximum concrete heights are used

in case the concrete is not heated up

to enable a faster curing.

8.2 Fire protectionIn case local safety regulations or project

design specifications require measures to

prevent fires spreading to adjacent rooms

or floors fire collars must be installed.

Wavin offers a comprehensive range of

fire collars that meet local regulations.

The functioning of these fire collars is that

in the case of direct heat the material in

the fire collar will expand and will

completely close the floor or wall passage.

For more information, please contact

Wavin.


Installation manualSpecial constructions

8. Special constructions

Figure 91. Installation of fire collars

through ceilings.

Figure 92. Installation of fire collars

through walls.

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8.1 Pipe systemsembedded in concrete

Pipe sections embedded in concrete

must be adequately fixed against thermal

movements.

This can be achieved by welding into the

pipe segment electrofusion sockets or

“puddle flanges”. Fixing is also achieved

when a branch or elbow is present in the

embedded pipe segment. However if a

branch is of a smaller diameter than the

main pipe, additional fixing must be

installed in the main pipe close to the

branch connection (see figure 89 and 90).

Figure 89. Fixing in concrete by using an

electrofusion socket.

Figure 90. Fixing in concrete by using a

puddle flange.

Please pay attention to the below issues:

Prior to concrete casting, the pipe

section must be tested for leak

tightness.

Pipework crossing a wall through a

protection sleeve cannot be seen as

a fixed-point.

As all thermally induced pipe stresses

have to be resisted by the concrete

around the pipe, the thickness of the

concrete surrounding the pipe should

be at least 30 mm.

8.3 Thermal insulationIn humid environments there can be the

need to insulate the pipe system to

prevent condensation and subsequent

water dripping from it. Condensation can

happen when the relative humidity is

above 40%. Commonly the temperature

in the top of buildings is rather high.

To prevent condensation on the pipe

surface, it is necessary to use sufficient

insulation thickness and a vapour sealed

foil on the outside. The thickness of the

insulation sheet depends on the ambient

temperature, the humidity and of course

the medium temperature. Be aware that

a high ambient temperature is more

critical for condensation than a low

ambient temperature. A risk assessment

by the designer shall reveal the need for

thermal insulation. For most situations, a

15 mm thick insulation sheet can be

taken as a guideline.

8.4 Acoustic plus thermalinsulation

When to install acoustic insulationsheets

Like any rainwater system, siphonic roof

drainage systems generate noise when

transporting rainwater. In sensitive areas

within buildings such as offices, concert

halls, courthouses and hospitals where

noise should be kept to a minimum level,

it is recommended to wrap the Wavin

QuickStream system in the relevant areas

with Wavin acoustic insulation sheets. In

addition to acoustic insulation, these

insulation sheets also provide a thermal

insulation.

The sheet is built-up around a layer with

a high specific weight acting as a sound

barrier. On the outside there is a water

resistant layer and on the inside a foam

layer provides thermal insulation. The

material can be easily bent and wrapped

around pipes and fittings.

With one layer the sound level can be

reduced between 15 and 22 dB, depen-

ding on the type of installation and the

location of the measurement.

Installation of acoustic insulation

sheets

The material is very flexible and is easy to

apply.

The Wavin acoustic insulation sheets can

be easily cut to size and shape with a

knife or industrial scissors.

Cut to required shape.

Fix to pipe and fittings using double

sided Wavin adhesive tape or a con-

tact cement/glue. The layer with the

high specific gravity needs to be

located on the outside.

It is of utmost importance to avoid

gaps.

Close seams with 50 mm wide

adhesive tape.

Installation manualSpecial constructions

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9.1 Discharge systems andcapacity

The discharge should be above water

level in gravity discharge systems of

sufficient capacity. To guarantee the

evacuation of air in the pipework and that

the attainment of siphonic action is not

retarded, the discharge point should be

installed at a higher level than the water

in the gravity drainage system. It is always

recommended to install an overflow relief

chamber. This inspection chamber

should have a cover with an open grating

to allow water overflow when the gravity

system is not able to cope with the

discharge capacity of the siphonic system.

For the calculation of the capacity of

storm water or combined sewer systems

a lower rain intensity is usually used

compared to the calculation for the

rainwater system of a building. When the

discharge of the Wavin QuickStream

system is in the building, the overflow

relief chamber should be installed outside

the building in the gravity system. If the

discharge of the Wavin QuickStream

system has been extended to outside the

building, Wavin can supply a special

overflow relief chamber with an inlet

connection to the Wavin QuickStream

system and a bigger outlet diameter

connection towards the gravity sewer.

If the discharge takes place directly in

open water or in a sewer system, the

Wavin engineers have adapted the last

pipe length to the appropriate diameter to

reduce the flow speed. In any case the

adjacent gravity discharge system must

be able to cope with the design flow of

the Wavin QuickStream roof drainage

system. The provided design of each

Wavin QuickStream system indicates the

maximum discharge flow. It is the

responsibility of the contractor to

investigate if the existing ventilated

drainage system has sufficient capacity.

As guidance table 10 presents the

maximum flow in [l/s] of 100% filled pipes

dependending on the gradient. For a

ventilated drainage system, a larger pipe

diameter should be selected.


Installation manualConnection to the gravity system

9. Connection to the gravity system

Table 10. Maximum flow in [l/s] of 100% filled pipes at various gradients of drainage pipes.

Note: Above table is based on a friction factor kb = 0.40 suitable for plastic pipes and a water temperature of 10°C. The Du reflects a

PVC SDR34 pipe class. Other pipe materials such as concrete might have a higher friction factor and consequently the above

table cannot be used for these materials.

Hydraulic gradient / slope

[mm/m] 1 2.5 5 7.5 10

slope 1:1000 1:400 1:200 1:133 1:100Du Di

100 1.9 3.1 4.4 5.4 6.3

110 2.1 3.4 4.8 6.0 6.9

125 2.9 4.8 6.8 8.4 9.7

150 5.5 9.1 13.0 16.1 18.6

160 5.8 9.3 13.2 16.2 18.7

200 10.6 16.8 23.9 29.4 34.0

200 12.4 19.8 28.1 34.5 39.7

250 19.2 30.4 43.2 53.1 61.4

250 22.6 35.7 50.7 62.3 72.0

315 35.5 56.1 79.6 97.7 113.0

300 36.6 57.9 82.1 100.0 116.0

400 66.9 105.0 149.0 183.0 212.0

400 78.5 123.0 175.0 215.0 248.0

450 91.3 144.0 203.0 250.0 289.0

450 107.0 168.0 239.0 293.0 338.0

500 120.0 190.0 269.0 329.0 381.0

500 141.0 222.0 315.0 386.0 446.0

630 221.0 348.0 493.0 605.0 699.0

600 228.0 360.0 509.0 624.0 721.0

800 487.0 765.0 1,082.0 1,326.0 1,532.0

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9.2 Buried pipe systemsThe general installation rules for

underground plastics pipes are

applicable. In short these rules are:

Keep trench widths as narrow as

practicable, but not less than 300

mm wider than the pipe.

Trench bottom must be flat and free

from stones or other hard obstacles

that might exert a point load on the

pipe later on.

PE pipe systems are normally welded

by either butt fusion or electro socket

fusion.

Underground PVC systems should

always be jointed by rubber seal

joints and never be solvent cement

welded.

Loosen the trench bottom.

Install pipe and check gradient.

Side-fill with non-cohesive soil, like

sand and compact especially to the

side of the pipe.

Complete side filling with non-cohesive

backfill material till approximate 0.3 m

above pipe crown.

Compact side-fill on both sides of the

pipe, preferably with a mechanical

compactor.

Complete back filling of the trench.

For this native soil may be used,

unless project specification indicate

differently.

Alternatively the EN1610 guidelines on

the installation of buried pipe systems

can be followed.

Figure 93. Excavation, bedding and

backfill.

Installation manualConnection to the gravity system

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Commissioning

As a Wavin QuickStream roof drainage

system operates at both over and under

pressures, it is necessary to carry out a

leak tightness test:

Close the discharge of each Wavin

QuickStream system and fill-up the

system with water to roof level.

Check all connections for leakages.

Unplug the discharge on completion

of the inspection.

If the building is over 40 meters high,

the pipe system needs to be split-up in

sections not higher than 40 meter.

After initial commissioning of the system,

a further inspection should be performed

as part of the total commissioning after

the first heavy rainfall, or at the latest

within the first half year of use.

Maintenance

Inspect in spring en autumn

Roof drainage systems will mostly be

inspected in spring and autumn. The

best moment is directly after the trees

have dropped their seeds and after

leaf fall. In geographical areas having

predictable rainy seasons, inspection

and maintenance should performed

just before rainy season starts.

Clean roof en gutters

Roof and gutters must be cleared of

deposits, whereby it is not allowed to

flush the dirt through the Wavin

QuickStream roof outlets.

Inspect roof outlets

All Wavin QuickStream roof outlets

must be inspected and checked on

proper functioning by letting water

run into the outlets. When water runs

away, the outlet is OK. Eventually a

small contamination in the system will

be flushed down with the first rainfall.

Inspect emergency overflow chamger

As accumulated dirt in the system will

be flushed into the emergency

overflow chamber or the reception

chamber, at least once a year this

part of the system must be inspected

as well.

Recommendations

If the emergency overflows have been

discharging during a rainfall, the roof

outlets need to be inspected for

obstructions. It is recommended to

record details of any such incidents

and the measures taken to rectify the

situation.


Installation manualCommissioning & Maintenance

10. Commissioning & Maintenance

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If after commissioning, water is observed

to regularly discharge through the

emergency overflows it can be concluded

that the system is not functioning

according design. Possible causes for

this are listed below.

Solutions related to improper

installation and/or maintenance:

Accumulated dirt can hinder the flow

towards the roof outlets.

Solution: clean the roof and the roof

outlets.

Construction debris in the system

reduces the flow capacity.

Solution: clean the pipe system.

There has been a violation with the

design, e.g. a wrong pipe diameter

(too big or too small), wrong pipe

lengths (e.g. tail pipes or distances

from outlet to collector pipe) or the

pipe layout is changed.

Solution: change the pipe layout to

the design made by Wavin or contact

Wavin for a new design.

In violation of the design, an additional

small roof or soil and waste discharge

is connected to the system, through

which air is sucked into the system.

Solution: change the pipe layout to

the design made by Wavin or contact

Wavin for a new design.

Solutions to problems caused by

operating outside the prescribed

design parameters or design criteria:

The main gravity sewer in which the

roof drainage system discharges is

over-loaded or blocked and no

emergency overflow chamber with

sediment catchments has been

installed.

Solution: install an emergency

overflow chamber between the

discharge point of the Wavin

QuickStream system and the main

gravity sewer system.

The water level in the discharge

chamber at the start-up of the

rainwater flow from Wavin

QuickStream system is too high so

that the escape of air is hindered.

Solution: reinstall the gravity sewer

pipe to a lower level or contact Wavin

to discuss the implications of instal-

ling the discharge point of the Wavin

QuickStream system at a higher level.

Due to high negative pressure air

cavities might occur, reducing the

maximum flow capacity.

Solution: Wavin verifies all designs on

the maximum allowable negative

pressure and adapts the design to

such an extent that cavitation will not

occur. Compare the installed system

to the installation drawings made by

Wavin and correct differentiations.

The emergency overflows have been

constructed too low. In that case the

build-up of a sufficient water level on

the roof enabling good priming of the

system will not take place. The system

cannot reach its design drainage

capacity while water is flushed away

through the emergency overflows.

Solution: increase the heights of the

emergency overflows in consultation

with the building designer and Wavin.

Advice can be sought from the Wavin

technical team.

11. Problem solving / technical support

Installation manualProblem solving / technical support

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QuickStream PE - Manual Wavin Presiune

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