Water Supply Schemes within the Jurisdiction of PWD (DWS) SD, Mandwi / S.H. Repair Maintenance of existing IRP attached with DTW scheme including changing of filter media with other allied work during the year 2025-26.

Providing and fixing G.I. pipes medim class as per IS : 1239 with latest amendment complete with G.I. fittings including trenching and refilling, cutting and making good the walls etc. complete as per CPWD specification and direction of the Engineer - in - charge. A. External work. i) 15 mm dia. nominal bore

ii) 20 mm dia. nominal bore

iii) 25 mm dia. nominal bore

iv) 100 mm dia. nominal bore

v) 150 mm dia. nominal bore

Providing and fixing C.I. sluice valves ( with cap ) complete with bolts, nuts, rubber insertions etc. ( the tail pieces if required will be paid separately ) as per CPWD specification and direction of the Engineer - in - charge. i) 150 mm dia. A. PN - 1.6

Providing and fixing CIDF Butterfly valve with bolts, nuts, rubber insertions etc. complete as per CPWD specification and direction of the Engineer - in - charge. ( The tail pieces, tappers etc if required will be paid separately ) i) 100 mm dia

Providing and fitting fixing of brass fullway valve with handle in the GI pipe line including cutting, threading etc. complete as per CPWD specification and direction of the Engineer - in - charge. i) 15 mm dia

ii) 20 mm dia

iii) 25 mm dia

Providing and fitting fixing of flexible PVC pipe (conforming to IS:7634) complete including earth work as per specification and direction of the Engineer - in - charge (cost of fittings will be paid separately) i) 15 mm dia

Providing and fixing G.I. Bend /elbow in the pipe line including testing of joints complete as per CPWD specification and direction of the Engineer - in - charge. i) 15 mm dia

ii) 100 mm dia

iii) 150 mm dia

Providing and fixing G.I. union as per CPWD specification and direction of the Engineer - in - charge. i) 15 mm dia

Providing and fitting fixing of 6 feet x 4 feet x 1 inch (thickness) Gamair wood / plywood pannel board for fitting fixing of electrical items, in/c 2 nos MS angle post ( size 2 inch x 2 inch x 9 feet ), nuts & bolts etc. for irrection of the same by 1:1.5:3 cement concrete casting ( 1 feet x 1 feet x 2 feet) below the ground level and painting two or more coats & plastic paint as per specification and direction of the Engineerin- charge.

Providing and fitting fixing with PVC insulated single core multistrand Copper cable conforming to IS : 694 for inter connection with all electrical equipments of the pannel board as per specification and direction of the Engineer-in-charge. i) 10 sqmm

Providing and fitting fixing of Moulded Case Circuit Breaker (MCCB) of different Thermal release range, 415 + V, 50Hz (L & T, BCH, ABB make) as per specification and direction of the Engineer-in-charge. i) 63-80 Amps

Providing earthing with perforated 40 mm dia G.I. pipe (Medium class) ( 12 mm dia perforation ), laying of 4 mm dia GI wire from earth electrode to panel, including excavating hole of 600 mm dia and refilling with Salt and Charcoal / coke in alternate layers of 300 mm, as per standard specification and direction of the Engineer-in-charge. i) for single phase connection with 2.50 mtr. Long G.I. pipe

Providing and fitting fixing 3 phase indicating lamp fiited with panel board with three different colour lamps with batten holder complete as per secification and direction of the Engineer-in-charge.

Providing and placing rapid gravity filter sand having effective size of 0.50 mm to 1.00 mm & uniformity co-efficient of not more than 1.70 and or less than 1.30 obtained from Barakar river West Bengal as per specification and the direction of the Engineer - in - charge.

Providing and placing filter gravel having effective size of 3.00 mm to 25 mm & uniformity co-efficient of not more than 1.70 and or less than 1.30 obtained from Barakar river, West Bengal as per specification and the direction of the Engineer - in-charge.

Providing & fitting fixing of MS flange ( 8 mm wall thickness ) by welding with G.I. / MS pipe and placing position as per specification and the direction of the Engineer-in-charge. i) 100 mm dia

ii) 150 mm dia

Providing and placing of anthracite coal ( 3 mm to 6 mm) of SP gr. 1.4 in IRP as per specification & direction of the Engineer-in-charge.

Lifting of filter media from package type IRP filter chamber as per specification and the direction of the Engineer-in-charge.

Charges for spreading of filter media ( sand and gravel after proper cleaning and washing ) inside the package type IRP as per specification and the direction of the Engineer-in-charge. (excluding the cost of sand and gravel ).

Providing and fixing MS bolts including nuts and washers complete as per standard design:- A) Upto 300mm length.

Welding by gas or electric plant including transportion of plant at site etc. complete as per standard design.

Removing white or colour wash by scrapping and sand papering and preparing the surface smooth including necessary repairs to scratches etc. complete.

Painting with synthetic enamel paint ( one or more coats ) of required colour of approved brand and manufacture on old work to give an even shade including preparation of surface as required complete as per direction of the Engineer in charge.

Painting with black anticorrosive bitumastic paint ( one or more coats ) of approved brand and manufacture on old work to give an even shade including preparation of surface as required complete as per direction of the Engineer in charge.

Supplying, cleaning and placing of manganese-dioxide (Mn2) (size 20 mm to 40 mm ) inside the oxidation chamber between two plate including removing existing old Mn2 from the chamber and disposed within 50 m lead complete as per direction of the Engineer-in-charge.

Providing and placing Polypropylene double hexagonal nut umbrella shaped strainer of 10 mm to 12 mm size of best quality as per direction of the Engineer-in-charge.

Providing fitting fixing of 150 mm dia butterfly valve ISI mark short water type with required nuts and bolts. i) 150 mm dia

Providing and fitting fixing CI plate NR valve of having 200CSM capacity on blower line of package type IRON Removal Plant of approved quality as per direction of Engineer - in - charge.

Repairing of non functional air blower of 300 m3/hr. capacity by dismantling, replacement of damaged parts, oiling, freasing & reassembling, realignment of mtc. pulley, motor pulley etc. to make the blower functional as per direction of the Engineer-in-charge.

Repairing of metering pump (SWELLORE make) of minimun capacity 6 LPH & maximum 25 LPH for 10000 GPH capacity IRP and pressure of pump 10 kg/cm2

Repairing of non functional air compressor of 10.0 to 20.0 cfm capacity by dismantling, replacement of damaged parts, oiling, freasing & reassemnling, realignment of mtc. pulley, motor pulley etc. to make the compressor functional as per direction of the Engineer-in-charge.

Providing and fitting fixing diaphragm valve washer of approved quality as per direction of the Engineer-in-charge.

i) 150 mm dia

ii) 80/100 mm dia

Providing and fitting fixing diaphragm valve MS spindle of approved quality as per direction of the Engineer-in-charge.

i) 150 mm dia

ii) 80/100 mm dia

Providing and fitting fixing of 3 mm rubber insertion best quality as per direction of the Engineer-in-charge

i) 150 mm dia

Providing and fitting fixing direct online type motor starter AC3, 415 V, 50 Hz, 3ph) 7.1 HP/5.5 kw relay range 9-15 Amps cataloge No. SS97210 in steel sheet enclosures of L & T make cat No. MK-DOLSS96211 suitable for metering pump as per direction of the engineer-in-charge.

Providing and fitting fixing direct online type motor starter AC3, 415 V, 50 Hz, 3ph) 7.1 HP/5.5 kw relay range 11-18 Amps in steel sheet enclosures of L & T make cat No. MK-DOLSS96211 suitable for 5.00 HP motor of compressor/ blower as per direction of the engineer-in-charge.

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