supply, installation, testing and commissioning of tube well submersible pumping unit at wss gantlipora. -supply, installation, testing & commissioning of tube wellsubmersible pumping unitas per is 14220for with following specification are as under :pump : discharge = 4000 gphhead = 110 mtrsefficiency= not less than 50% , speed= 2900 rpmtype of pump = tubewell submersible pump type of fluid to be handled=clear watermotor:-motor rating= 12.5hp / as per oemmethod ofstarting = star – delta speed = 3000 ( sync ) .frequency = 50 ± 3 % hz , working voltage= 380-415 ± 15% v, 03 phaseefficiency= not less than 90%class of insulation=f / suitable for above parameters submersible motor should be water filled water lubricated squirrel cage type having capacity for above pumping parameters and working on 3 phase; ac supply ranging from 380 to 415 volts, 50hz. the motor should be sealed by radial rings to avoid mixing of well water with motor filled water. a ) the job includes providing and fitting of interlocking arrangement against any failure of coupling. it must be fabricated out of ms strips of suitable size and length.b ) the job includes providing and fitting of appropriate size ms nipple 2 feet long threaded on one end and welded to same size ms flange ofthickness ( as per table-17 ) at other end for column pipe as per site requirement. the threaded portion should be as per size of pumping out let for proper fixing. the job includes providing and fitting of r. i. cloth joints / rubber washers with nuts, bolts and washers for all joints of column pipe.the job also includes lowering of pumping unit in the well then proper testing and commissioning of pumping unit on full load at site. note: providing of test certificate & characteristic curve of pumping equipment is compulsory and pumping unit is to be approved from the concerned sub divisional office before procuring