Specifications Part 1 - Water Supply, Sewerage and Tube Well Works

A valve in which the closure to an opening such as a plug or gate is actuatedby a float to control the flow into a tank.Fittings:Gasket:Coupling, flange, branch, bend, tee, elbow, union, waste with plug, P or S trapwith vent, ferrule, stop tap, bib tap, pillar tap, globe tap, ball valve, cistern,storage tank, baths, water closets, boiler geyser, pumping set with motor andaccessories, meter, hydrant valve and any other article used in connection withwater supply, drainage and sanitation.A piece of compressible material used to make a joint between two flatsurfaces.Gully Chamber:The chamber built of masonry around a gully trap, for housing the same.Gully Trap:Haunching:A trap water seal provided in a drainage system in a suitable position to collectwaste water from the scullery, kitchen sink, wash basins, baths and rain waterpipes.Concrete bedding with additional concrete at the sides of the pipe.Invert:The lowest point of the interior or a sewer or drain at any cross action.Inspection Chamber:A water tight chamber constructed in any house drainage system which takeswastes from gully traps and disposes off to manhole with access for inspectionand maintenance.Interceptor Manhole:A manhole incorporating an intercepting trap, and providing means of accessthereto and equipped with a fresh air inlet on the upstream side of the trap.Junction Pipe:A pipe incorporating one or more branches.Manhole (Manhole Chamber):Any chamber constructed on a drain or sewer so as to provide access theretofor inspection testing or the clearance of obstruction.NippleA tubular pipe fitting usually threaded on both ends and less than 300mm longused for connecting pipes or fittings.Non Return Valve:A device provided with a disc hinged on one edges so that it opens in thedirection of normal flow and closes with reversal of flow.Urban Administration & Development Department Page 4