bids are invited for supply assembly erection testing and commissioning of air source heat pump water heater capacity is 500 litre type is v hp 500 immersion heaters heating capacity w is 5800 w , providing and placing on terrace at all floor levels polyethylene water storage tank isi is 12701 marked with cover and suitable locking arrangement and making necessary holes , providing and fixing ptmt extension nipple for water tank pipe fittings of approved quality and colour 25 mm nominal bore weighing not less than 62gms , providing and fixing gi pipes complete with gi fittings and clamps including cutting and making good the walls etc internal work exposed on wall 25 mm dia nominal bore medium , providing and fixing g i union in g i pipe including cutting and threading the pipe and making long screws etc complete new work 25 mm nominal bore , providing and fixing gate valve with of approved quality 25 mm nominal bore , providing and fixing ball valve brass of approved quality high or low pressure with plastic floats complete 25 mm nominal bore , providing and fixing polyethylene aluminum polyethylene pe alpe composite pressure pipes conforming to is is 15450 uv stabilized with carbon black having thermal stability , steel work welded in built up sections framed work including cutting hoisting fixing in position and applying a priming coat of approved steel primer using structural steel etc as required total quantity : 22652