tender for work of supply and installation of water storage tank dy.he city office under the maintenance of ae(maint)ww citys section. , providing and placing on terrace (at all floor levels) polyethylene water storage tank, isi : 12701 marked, with cover and suitable locking arrangement and making necessary holes for inlet, outlet and overflow pipes but without fittings and the base support for tank. , 25 mm nominal outer dia pipes , 50 mm nominal outer dia pipes , providing and fixing gun metal gate valve with c.i. wheel of approved 50 mm nominal bore , providing & fixing composite hot press glass fibre reinforced mosquito proof lid for overhead water storage tank, for prevention of malaria including transport, locking arrangement etc. complete as directed for tank capacity above 3000 liters.