John Brooks Company

Limited

Gravity vs Low Pressure

Systems

March 5, 2015

Introduction

•Requires minimal environmental disruption

•Solves difficult sewer applications

•Proven, reliable technology

•Saves money

LPS: An Alternative Sewage Collection System

The System

• A grinder pump station

is located in the yard or

basement of each home.

• Sewage flows into the

station from the

building’s sewer line

(typically 4-inch).

• The basin contains a

specially-designed

grinder pump with

integral level controls.

The System

• The pump is activated when

the depth of sewage in the

tank reaches a

predetermined “on” level

and continues to run until it

reaches the “off” level.

• The run time is short, power

consumption is low, and a

long pump life is ensured.

• The pump grinds the

sewage into a fine slurry

and discharges it into the

sewer main.

ALARM

ON

OFF

The System

The grinder pumps are

connected to a small-diameter,

low pressure main laid along

the edge of the roadway,

following the contour of the

land. The low pressure main

delivers the wastewater

to a central treatment

system, lift station,

manhole, or force main.

Transporting sewage

several thousand feet to a

discharge point at a higher

elevation is commonly

accomplished with low

pressure sewers.

The System

A New Option for

Builders and Developers

E/One Sewers provide builders and developers with

cost-effective, high-quality, proven solutions for central

sewers.

Discover New Freedom

in Land Planning

Land projects or orphan sites once considered cost

prohibitive to develop can now generate profits.

Reduce Upfront Costs. Increase Profit Margins.

Infrastructure development costs are lowered

• Major excavation is eliminated

• Labor and material costs are dramatically reduced

• Environmental disruption and restoration are

minimized

E/One Low Pressure Sewers are your solution

for financial success

Your Alternative

to Gravity

Gravity Systems

With conventional gravity sewers:

• Wastewater leaves the home and flows down sloped

pipes

• Because wastewater can only flow downhill so far, it is

necessary for a lift station to pump it up, so that

gravity can take over again

• The lift station process occurs as many times as

necessary to get the wastewater to the treatment

facility

• Each lift station can occupy a potentially marketable

lot or brutalize sight lines

Gravity Systems

Gravity sewers require big equipment,

major excavation and lift stations.

A better solution with obvious advantages.

• E/One Sewer Systems do not rely upon the limitations of gravity

• Wastewater is pumped through small diameter pipes following the contour of the land, set just below the frost line

• Lift stations are eliminated in virtually every installation

E/One Sewer Systems

E/One Sewer Systems

E/One Sewers

cause minimal

disruption because

they are placed in

narrow, shallow

trenches.

Directional boring

can eliminate the

need for trenches.

E/One Sewer Systems

The bigger the pipe, the higher the costs.

Gravity sewers require mains up to 24 inches in diameter.

Gravity Systems

Smaller pipes dramatically reduce

up-front costs.

E/One Sewers start with

1 ¼- inch PVC piping

from the home to 2- to 4-

inch PVC force mains.

E/One Sewer Systems

Which would you rather buy and install

five miles of: 4” or 24” pipe?

Gravity Sewers

bury your capital

in the ground.

They require:

• Time and money with

big equipment

• Major excavation and

restoration

• Expensive materials

High labor costs

All Up-Front Costs

Gravity Systems

The Money Story

Total Savings

The E/One Sewer System can

reduce costs by 50% or more

compared to conventional

gravity systems.

Cost per Linear Foot Comparison

0

10

20

30

40

50

60

70

80

90

6' Deep 12' Deep 18' Deep 2" Dia 3" Dia 4" Dia

$ per Linear Foot

Gravity

(8” pipe) E/One Sewer

(Average depth 3-4 feet)

The E/One Sewers cut up-front costs

and reduce installation time.

• Reduced carrying costs

• Deferred material and infrastructure costs

• Requires only shallow, narrow trenches

• Fewer manholes and lift stations

• Accelerated infrastructure development

E/One Sewer Systems

Spending Delayed Until House is Built

The cost of the pump and installation is deferred until

just prior to closing.

E/One Sewer Systems

• Flexibility in development design and sight lines; no deforestation

• Performance – more than 35 years experience; over 500,000 users worldwide

• Environmental safety – closed system eliminates groundwater contamination from failed septic tanks

• E/One Sewers can be specified for virtually all site conditions

• Groundwater infiltration eliminated by pressure-tight mains, minimizing size of treatment plant

Additional Benefits

Gravity

Systems:

Gravity Systems

Burying Your Money

in the Ground!

Cost Comparison: Saw Creek, PA

Hilly terrain with a high water table

2,500 units installed

Savings: $3,043,000 or 49%

$ M

0

1

2

3

4

5

6

Gravity E/One

Cost Comparison: Weatherby Lake, MO

Rolling hills waterfront

300+ units installed

Savings: $3,400,000 or 55%

$ M

0

1

2

3

4

5

6

7

Gravity E/One

Cost Comparison: Hartland Township, MI

Steep shorelines

590 units installed

Savings: $1,164,000 or 17%

$ M

0

1

2

3

4

5

6

7

8

Gravity E/One

Savings: $5,569,000 or 43%

Cost Comparison: High Springs, FL

Flat terrain with significant hard rock sub-surface

1,350 units projected

$ M

0

2

4

6

8

10

12

14

Gravity E/One

Cost Comparison: Hood’s Hollow, WI

Environmentally sensitive land with a running creek

29 units installed

Savings: $147,000 or 31%

0

50

100

150

200

250

300

350

400

450

Gravity E/One

$ 000s

Riverview Landing

Fairfield Glade

Case Studies

An elegant country estate community in upstate New York

Riverview Landing

Developing this

spectacular 160-acre

site overlooking the

historic Mohawk River

was cost-prohibitive

for a conventional

gravity system.

The Land

The Problem

• Steep, rocky terrain

• Dense clay soil mixed with weathered shale

• E/One Sewer System using 1 1/4-inch PVC piping

• 3-inch street mains at a depth of only 5 feet

E/One Sewers saved more than $100,000, cutting up-front

costs by more than 50%.

The Solution

Country Estate Community

• 42 estate homes

• Price range: $400,000 to

$1,000,000

• 2- to 4-acre lots

• Golf course, fish ponds,

tennis courts and boat

slips on the Mohawk

Riverview Landing Today

“We had to provide an on-site sewage disposal

solution. There were no public sewers available.

E/One’s low pressure sewer system was the only

economical and feasible way to go. In doing so, we

saved over $100,000.”

“We saved over $100,000…”

Michael Mastropietro Consulting Engineer

Riverview Landing

A resort and retirement community in Tennessee

Fairfield Glade

Eleven lakes

scattered throughout

a picturesque

wooded setting in the

Cumberland

Mountains presented

a unique challenge

for developers.

Spectacular lake-front sites set high in the Cumberland

Mountains (the elevations range between 1,665 feet and

3,000 feet) promised to be a dream setting for upscale

homeowners. Yet these same qualities presented a

unique challenge for developers.

The Land

• Sub-surface

sandstone

• Extensive lake

frontage

• Wide range of

elevations

Fairfield Glade sits on a hard-to-blast sandstone. The

waterfront properties and rolling elevations made gravity

sewering largely impractical.

The Problem

• Installing 31 miles of

E/One Sewer

• Connecting 2- and 6-inch

PVC pressure mains to

existing gravity mains

E/One Sewers saved this community of 1,300

(and growing) more than $1,000,000 to date.

Average annual maintenance costs are less than

$30 per home – 30% below projections.

The Solution

A Spectacular Resort and Retirement Community

• 3,500 homes built around 11 lakes

• Estimated population of 5,000

• Four golf courses

Fairfield Glade Today

“We run careful economic studies for each new sewer

distribution project. Study factors include: first cost, tap

cost, maintenance cost, and interest. Having the option

to use low pressure sewers has saved the Fairfield

Glade community in the neighborhood of $1,000,000

over the past 13 years.”

“We saved over $1,000,000

over the last 13 years…”

Thomas V. Swaford VP, Engineering

Fairfield Glade, Inc.