supply of water supply plumbing system cpvc pipe 20 mm 30 mtr cpvc pipe 25 mm 50 mtr pvc waste pipe 50 mm 20 mtr cpvc elbows 20 nos tees 10 nos couplers 15 nos unions 6 nos reducers 6 nos end caps 6 nos brass ball valves 6 nos brass bib cocks 6 nos non re