tender for earth work excavation and depositing on bank with initial lead of 10 m and lift of 2 m in narrow trenches for laying of pipes for water supply in the hard stiff clay, stiff black cotton, hard red earth, shales, murram gravel, stoney earth and earth mixed with small size boulders and hard gravelly soil. , supplying pvc pipes and spls including all cost and conveyance and labour charges etc complete as per std specification , solvent cement , 90 mm 6 ksc pvc pipe , 90mm 6 ksc pvc coupler , 90mm 6 ksc pvc bend , 90mm 6 ksc pvc tee , 80mm sluice valve , 80mm flange set , 90mm pvc mta , lowering pvc pipes to trench and laying to proper grade and alignment jointing with pvc couplers with cement paste , testing of pvc pipes with hydraulic testing equipment by filling with water and testing to recommended pressure in convenient stretches and attending the bursts if any occurred during the test , replacement of damaged portion of existing under ground drainage (the rate including the cost of pvc pipe & spls, labour cost) , replacement of damaged portion of existing under ground drainage (the rate including the cost of pvc pipe & spls, labour cost) , labour charges for linking arrangements. , refilling the trench with excavated earth including all cost and labour charges etc complete