REPAIR AND MAINT OF EXTERNAL WATER SUPPLY NETWORK AT KHUMBATHANG

Amount

Excavation in trenches in any type of soil n.exc 1.5m wide and not exc 1.5m in depth for foundationsor for shafts, wells,cespits, manholes pier holes etc. and getting out in any type of soil complete all as specified and directed by Engr-in-Charge.

Returning and filling in, including spreading, levelling, watering and well ramming in layers not exc 25 cm. thick each of any type of soil, complete all as specified and directed by Engr-in-Charge.

Removing excavated material at a dist not exc 50 mtr and depositing where directed at a level not exc 1.5 mtr from the starting point complete all as specified and directed by Engr-in-Charge.

Taking out/down old, rusted, unserviceable and damaged steel tubing incl disconnecting from existing line and connection where directed including cleaning for refixing or removal to store for pipes of following bore sizes ;-

Relaying of steel water tubing in new or old position where directed including making connections and cleaning of the pipe bore all as directed by Engr-in-Charge. Provision of GI/DI specials will be measured separately under relevant item.

Supply and fixing of steel water tubing galvanized medium grade laid in trenches/walls including all necessary fittings clamps etc complete and connecting to existing system complete all as specified and directed by Engr-in-Charge. Following bore sizes:-

Material and labour for cutting and screwing existing steel tubing for alterations or addition or for inserting tee connection etc. complete all as specified and directed by Engr-in-Charge. Following bore sizes:-

Supply and fixing of following GI specials to be fixed in existing / relaying GI tubing where required for making serviceable of the line complete all as specified and directed by Engr-in-Charge. Following

(a) GI union15mm

(b) GI union 20mm

(c) GI union 25mm

(d) GI union 40 mm

(e) GI union 50 mm

(f) GI elbow 15mm

(g) GI elbow 20mm

(h) GI elbow 25mm

(j) GI elbow 40 mm

(k) GI elbow 50 mm

(l) GI nipple 6" long 15mm

(m) GI nipple 6" long 20mm

(n) GI nipple 6" long 25mm

(o) GI nipple 6" long 40mm

(p) GI socket 15mm

(q) GI socket 20mm

(r) GI socket 25mm

(s) GI socket 40mm

(t) GI socket 50mm

(u) GI reducer of size 50/40mm

(v) GI reducer of size 40/25mm

(w) GI reducer of size 25/20mm

(x) GI TEE of size 50x50x40mm

(y) GI TEE of size 40x40x25mm

(z) GI TEE of size 25x25x20mm

Supply & fixing in repair gun metal gate valves with iron wheel head screwed both ends for GI pipe including takingdown old one of the following dia complete all as specified and directed by Engr-in-Charge.

M & L for lifting of unserviceable motor with impeller set of capacity 20 HP and removing burnt winding and rewinding with new copper wire of suitable size, greasing, servicing , changing bushes/flanges and bearings of suitable size and re-assembling, including re - installation of pump set in the same position alongwith all necessary work including testing complete all as specified and directed by Engr-in-charge. Note:- Item rate includes replacement of unserviceable/wearout/tearout parts like nuts, bolts, washer, gaskets, rubber rings alongwith necessary major unserviceable parts of the pump set.

M & L for taking up/down unserviceable pump motor of capacity 20 HP removing burnt winding and rewinding with new copper wire of suitable size, varnishing and painting of the exterior body complete with servicing by greasing, changing bushes/flanges and bearings of suitable size, refixing with new bolt and nuts of suitable size complete all as specified and directed by Engr-in-Charge. Note:- Item rate includes replacement of unserviceable/wearout/tearout parts like nuts, bolts, washer, gaskets, rubber rings alongwith necessary major unserviceable parts of the motor.

M&L for following spares for 20 HP centrifugal pump

(a) Impeller made of Gun metal for pump

(b) Pump shaft stainless steel upto 5 stage

(c) Seal ring made of Gun metal

(d) Discharge bush made of gun metal

(e) Suction bush made of gun metal

(f) CI stage bowl

(g) Housing Head Complete Front/Rear

(h) SS Pump motor coupling as per sample

Supply and fixing of pressure booster pump of capacity 1 HP including neccessary connections complete all as specified and directed by Engr-in-Charge.

Supply & fixing in repair automatic star delta starter 415 V 3 phase suitable for 20 HP motor complete all as specified and directed by Engr-in-Charge.

M & L 3 layer PP-R Polypropylene random copolymer pipes SDR 7.4 & SDR 11 UV of the following sizes stabalised and antimicrobial welded having thermal stability for hot & cold water supply including all PP-R plain & brass thereaded polypropylene random fittings to be laid in trenches/walls/floors etc.complete all as specified and directed by Engr-in-Charge. Note:- All connected PPR fittings viz. elbow, coupling, Tee, Reducer etc. any type/size as per existing shall be counted in RM for PPR Pipes.

(a) 20 mm dia

(b) 25 mm dia

(c) 32 mm dia

(d) 40 mm dia

M&L for PP-R gate valves (Brass insert) of the following sizescomplete all as specified and directed by Engr-in-Charge.

(a) 20mm dia PPR pipe

(b) 25 mm dia PPR pipe

(c) 32mm dia PPR pipe

(d) 40 mm dia PPR pipe

M & L for making connection of PP-R distribution branch with PP-R main of sizes upto 40 mm dia by providing and fixing tee including cutting and making fusion joint etc. complete all as specified and directed by Engr-in-Charge.

M & L for cleaning of RCC tank of capacity 40000 ltr with fresh water and bleaching powder for complete removal of scales and fungus draining out the cleaning water manually / drain valve away from the tank and pump house premises, complete all as specified and directed by Engr-in-Charge.

M & L for cleaning of RCC tank of capacity 80000 ltr with fresh water and bleaching powder for complete removal of scales and fungus draining out the cleaning water manually / drain valve away from the tank and pump house premises, complete all as specified and directed by Engr-in-Charge.

Deduct Credit for Demolished/Dismantled material Rs (-) 1,39,642.00 (Minus) as listed in Schedule 'A' Sec-II (Credit Schedule) Note : Tenderers will not quote against this item being a tentative amount, to be considered to arrive at the 'Contract Sum'.

M/S RW INFRA