TECHNICAL SUBMISSION SECTION C PLUMBING SPECIFICATIONS

Construction of Masjids-Package C 1 C2/PL/18 March 2013

wrapped with Denso tape after testing. Concrete thrust blocks, size 300 x 300 x 300 shall be provided at every junction and change of direction.

B.3 WATER STORAGE TANKS POLYETHYLENE OR GLASS REINFORCED PLASTIC The water storage tanks shall be made of polyethylene or glass reinforced plastic, suitable for storage of potable water and resistant to ultra-violet rays. Tank shall not encourage the growth of algae. The tank shall have a smooth internal surface, single piece body with no seams or joints. Tanks shall be fitted with accessories as shown on the drawings. After installation, tanks shall be filled with water for testing for 24 hours. No leakage shall be observed at joints. On completion of leak tests, the tank shall be flushed out twice using maximum water pressure available and all extraneous matter removed including the water used during the operation. The whole of the installation shall be guaranteed for a period of 5 years. Any defect/damage or leakage occurred during the guarantee period shall be made good by the Contractor at no cost to the Client. SECTIONAL WATER STORAGE TANKS The water storage tanks shall be made of sectional glass fiber reinforced polyester panel construction suitable for potable water and resistant to ultra violet rays. Tank shall not encourage the growth of algae and shall have a smooth internal surface for easy cleaning. Raw material for water tank panels shall contain long continuous strand fiber to provide high strength. Sealing material between panels shall be high quality material approved for potable water. Assembly bolts shall be high strength stainless steel bolts. Internal bracing shall be high strength stainless steel bars. Tank dimensions shall be as indicated on the drawings. Each tank shall contain external ladders 2 nos. (Steel with hot dip galvanized coating), internal ladders 2 nos. (PVC) and manholes Ø 600 mm 2 nos. Tank shall include air vent size 100 mm dia. and 210 mm height x 2 no. The tank shall be supported on steel skid base members with size 125 x 65 x 6 mm and supporting reinforced concrete beams with dimensions 500 x 300 x 3 Nos. to suit tank dimensions. After installation, tanks shall be filled with water for testing for 24 hours. No leakage shall be observed at joints. On completion of leak tests, the tank shall be flushed out twice using maximum water pressure available and all extraneous matter removed including the water used during the operation. The whole of the installation shall be guaranteed for a period of 10 years. Any defect/damage or leakage occurred during the guarantee period shall be made good by the Contractor at no cost to the Client. B.4 ELECTRICAL WATER HEATER Electric water heater shall be of the cylindrical type suitable for either vertical or horizontal mounting as shown on the drawings.

TECHNICAL SUBMISSION SECTION C PLUMBING SPECIFICATIONS

Construction of Masjids-Package C 1 C2/PL/19 March 2013

Each electric water heater shall be complete as specified herein:

a. Welded steel shell galvanized after fabrication and constructed in accordance with an approved international code for unfired pressure vessel, designed for a working pressure of 150 psig and hydrostatically tested to 300 psig at the factory. The tank shall be glass lined (300 microns) with vitreous porcelain enamel tank liner and shall be certified by UL.

b. Stove enameled finished and 2” thick insulated metal outer jacket. c. Electric immersion type heater element. Number of stages to be as given in the

schedules of capacities. The element shall be copper sheathed. d. Adjustable type temperature control thermostat and factory installed high limit cu-off (for

safety and prevent over heating). e. Dial type immersion thermometer. f. Magnesium anode rod. g. Terminal box with protective cover. h. Pilot light to indicate if heater is ON or OFF. i. Gate valve and check valve at water inlet and gate valve at outlet connections. j. Pressure and temperature relief valve for protection against excess pressure and high

temperature as well as loss of water from the shell. k. Automatic air vent / Anti-vacuum valve. l. Steel supports. m. All pipe work and accessories required for its installation and satisfactory operation

including drain. n. Guarantee for a period of minimum 5 years.

The electric immersion heaters shall be made of copper and shall have electric ratings as shown on the drawings. Water heater shall have factory fitted control panel complete with all necessary safety and controls. It shall be completely factory assembled / wired requiring only final connections at site and shall be suitable for electrical provisions made on electrical drawings.

B.5 PACKAGED Lifting and BOOSTER PUMPSET

Packaged Lifting pumpset shall be installed for filling roof tanks. The unit shall be of the auto-pneumatic type complete with pumps, control panel, interconnecting pipework, electrical wiring etc., fixed to a single base plate. The pump shall be high efficiency centrifugal, vertical single / multi-stage type, of cast iron construction with stainless steel shaft and stainless steel or bronze impellers and with mechanical sealed bearings. All interconnecting pipework to be in copper to BS 2871 Part 1 Table X with fittings to BS 864 Part 2. Each pump shall be provided with an isolating valve at the inlet and an isolating valve, non-return valve at the outlet. The booster pumpset shall be provided with flexible connections at the inlet and outlet. The booster pumpset shall be provided with a strainer at the inlet.