providing and fixing clorinate polyvinyl chlorode (cpvc) pipes, having thermal stability for hot & cold water supply, including all cpvc plain & brass threaded fittings, i/c. fixing the pipe with clamps at 1.00 m spacing. this includes jointing of pipes & fittings with one step cpvc solvent cement and the cost of cutting chases and making good the same including testing of joints complete as per direction of engineer-in-charge concealed work including cutting chases and making good the etc. 20 mm nominal outer dia pipes dar no- 18.8.2