REPAIR MAINTENANCE OF EXTERNAL WATER SUPPLY, DISTRIBUTION SYSTEM AND CONNECTED ITEMS AT AF STN CHIMNEY HILLS

Excavation in trenches n.exc 1.5m wide and n.exc 1.5m deep and getting out in hard/dense soil for laying/repair of water Pipe.

Returning filling in including spreading levelling watering and well ramming in layers not exceeding 25cm thick.

Removing excavated materials to a distance n.exc 50m and depositing where directed at a level n.exc 1.5m above the starting point.

Taking out old unserviceable CI sluice valve and S & F new cast iron sluice valve 100 mm dia with s/s spindle complete assembly, class PN 1.0, ISI marked including providing rubber joints suitable for flanged pipes complete all as specified and directed .

All as per item No 4 above but 150 mm dia size.

M & L for repairs to sluice valves in position installed at various locations, taking out upper portion of valve, replacement of U/S Stainless steel spindle with check nut, cleaning and grinding the valve gate and assembling the valves including replacing the worn out nuts & bolts, rubber gasket, gland packing and servicing complete for 150mm bore size.

All as per item No 6 above but for 100mm bore .

Supply in replacement, laying, jointing and leakage testing GI Pipe 100 mm bore medium grade (ISI marked) including all fittings such as bend, tee, elbow, union, reducer etc, laid in trenches / floor/ walls etc complete all as specified and directed. Notes: (i) The laying and jointing of pipes are required to be carried out in short / long streches catering to specific requirements of a particular quarter, building block or a group of blocks. (ii) Excavation & earth work shall be measured & paid seperately under respective item of BOQ.

All as per item ser No 8 here in before but of size 50mm dia.

All as per item ser No 8 here in before but of size 25mm dia.