retrofitting of existing combined water supply scheme to 306 habitation, providing fhtc 275nos and distribution line 3875m in valikandapuram east side at valikandapuram panchayat.package no tn11 - 22 -lowering 4 refilling 5 saddle ( 63 x 20 ) 6 brass feerrule 15mm 7 fixing ferrule 8 15 lpm flow control 9 20 mm pvc elbow 10 20mm pvc fta 11 20mm pvc mta 12 15 mm brass tap 13 cutting 20mm pvc pipe 14 precast rcc platform 15 earth work excavation and depositing on sides with an initial lead and lift in allclasses of hard soils and loose soils as per ss20b for foundation 16 63 mm pvc pipe 4 kg twad pg no 16 sl. no 2 17 63 mm pvc elbow twad pg no 22 sl. no 8 18 63 mm pvc tee 4 kg twad pg no 27 sl. no 5 19 63 mm pvc end cap twad pg no 27 sl. no 11 20 laying and joining of pvcpipes and specials of all labour charges etc completed twad pg no 248 sl. no 11b ( i ) 21 refilling the basement with excavated earthother than sandcomplying the standard specification twad pg no 269 sl. no 19.b 22 provision for water meter 50 mm , page 81 of sor twad 23 dirt box 24 fittingcharges of meter in oht column 25 contingencies & provision for specials 26 cementconcrete1:4:8 ( one cement four sand and eight aggregates ) using 40mm hbgs for levelling course for foundation including the cost of mixing concrete, ramming, curing etc., complete. 27 cc 1:2:4 using 20mm graded aggregtes of hbgs centering, shuttering strutting, but including cost of mixing concrete, placing, finishing, curing etc., complete