Providing and fixing H.C.I. Floor traps conforming to I.S.I. Specification (IS:1729) of approved make (to the approval of Engineer-in-charge) of the self cleaning design with C.P. brass hinged grating with frame with or without vent arm and including cement concrete 1:2:4 under and around the floor trap where required upto floor level complete in all respects including cutting and making good the walls and floors,etc. minimum depth of water should be 150mm with a minimum seal 50mm. With 100mm i/d outlet shallow seal