maintenance and upkeep of ports water supply system for a period of 3 years from the year 2020 . , excavation in loose or soft soil including removal of obstructions such as small vegetations etc . if any . all labour , materials , tools and plants etc complete . complete . , excavation in dense or hard soil/murrum etc . including removal of obstructionetc . all labour , materials , tools and plants etc complete . if any complete . , excavation in hard rock laterite boulders interspersed removal of obstructions etc . if any . all labour , materials , tools and plants etc complete . complete . , plain cement concrete ( 1:2:4 ) using 20mm graded black trap agg . etc . all labours , materials , tools and plants etc . complete . , description as detailed in item , no . 4 but for p . c . c ( 1:3:6 ) . all labour , materials , tools and plants etc complete . complete . , providing and fixing shuttering for coloumn , beams , side walls etc . of any size and shape including cleaning etc . all labour , materials , tools and plants etc complete . complete . , construction masonry using precast cement concrete blocks having a crushing strength of 35kg/cm2 etc . all labour , materials , tools and plants etc all labour , materials , tools and plants etc complete . , providing and fixing to the wall floor etc . gi pipe ( class-b ) 12/15mmdia including joining , and dismantling of old pipes etc . all labour , materials , tools and plants etc complete . , providing and fixing in trenches 12/15mmdia gi pipe ( class-b ) , including all fittings and dismantling of old pipes but excluding excavation etc . all labour , materials , tools and plants etc complete , p&f to the wall gi pipe 25mm dia ( class b ) including dismantling of old pipes etc . all labour , materials , tools and plants etc complete . , p&f in trenches 25mm dia gi pipe ( class b ) , including all fittings and dismantling of old pipes but excluding excavation etc . all labour , materials , tools and plants etc complete . , p&f to the trenches wall 40mmdia g . i pipe ( classb ) , including all fittings and dismantling of old pipes but excluding excavation etc . all labour , materials , tools and plants etccomplete . , p&f in trenches 50mmdia g . i pipe ( classb ) , including all fittings and dismantling of old pipes but excluding excavation etc . all labour , materials , tools and plants etc complete . , p&l in trenches 80 mm dia g . i pipe ( classb ) , including all fittings and including dismantling of old pipes but excluding excavation etc . all labour , materials , tools and plants etc complete . , p&l in trenches , walls etc 100 mm dia g . i pipe ( class b ) , including all fittings and including dismantling of old pipes but excluding excavation etc . all labour , materials , tools and plants etc complete . , providing connection to the existing 20mm ppr pipe with upvc pipe ( 15 mm dia ) with necessary specials required for joining ppr pipe specials and upvc pipe specials at the both the ends of repair work , including cutting existing pipe and inserting necessary specials required for ppr pipe ( brass mta ) and upvc pipe ( brass fta ) , necessary instruments /solution required for joining and cutting ppr pipe and upvc pipe . the cost to include all specials required at both the ends of repair work , necessary breaking the wall and making good the same , necessary scaffolding required for working at above ground level except the cost of upvc pipe 15mm dia if laid between the repair work which will be paid under item no 25 ( per joint represent ppr and upvc specials required at one end of joint ) . all labour , material , tools and plants etc complete . , providing connection to the existing 32mm ppr pipe with upvc pipe ( 25 mm dia ) with necessary specials required for joining ppr pipe specials and upvc pipe specials at the both the ends of repair work , including cutting existing pipe and inserting necessary specials required for ppr pipe ( brass mta ) and upvc pipe ( brass fta ) , necessary instruments /solution required for joining and cutting ppr pipe and upvc pipe . the cost to include all specials required at both the ends of repair work , necessary breaking the wall and making good the same , necessary scaffolding required for working at above ground level except the cost of upvc pipe 25 mm dia if laid between the repair work which will be paid under item no 27 ( per joint represent ppr and upvc specials required at one end of joint ) . all labour , material , tools and plants etc complete . , providing connection to the existing 50mm/63 mm ppr pipe with upvc pipe ( 40mm/50 mm dia ) with necessary specials required for joining ppr pipe specials and upvc pipe specials at the both the ends of repair work , including cutting existing pipe and inserting necessary specials required for ppr pipe ( brass mta ) and upvc pipe ( upvc threaded socket on one side ) , necessary instruments /solution required for joining and cutting ppr pipe and upvc pipe . the cost to include all specials required at both the ends of repair work , necessary breaking the wall and making good the same , necessary scaffolding required for working at above ground level and necessary tools required for exposing the pipe except the cost of upvc pipe 50 mm dia , if laid between the repair work which will be paid under item no 29/30 ( per joint represent ppr and upvc specials required at one end of joint ) . ( cost of excavation will be paid as per item no 1 , 2 , 3 as the case may be ) all labour , material , tools and plants etc complete . , p & l in wall , floor , trenches etc , 15mm dia c . p . v . c pipe ( sdr 11 ) of prince make or equivalent including joining with sockets , bends , tees , specials , reducer specials of required size for connecting existing pipes , , . all cutting threading and joining materials cost pipes and specials , etc . , excluding the cost of excavation but including breaking the wall/ floor /chajja and making good the same . all labour materials , tools , plants etc . complete . , p & l in wall , floor trenches etc , 20mm dia c . p . v . c pipe ( sdr 11 ) of prince make or equivalent including joining with sockets , bends , tees , specials , reducer specials of required size for connecting existing pipes , , . all cutting threading and joining materials cost pipes and specials , etc . , excluding cost of excavation but including cost of breaking the wall/ floor /chajja and making good the same . all labour materials , tools , plants etc . complete . , p & l in wall , floor . trenches etc , 12/ 15mm dia u . p . v . c pipe of prince make ( schedule 40 ) or equivalent including joining with sockets , bends , tees , specials , reducer specials of required size for connecting existing pipes . all cutting threading and joining materials cost pipes and specials etc . , excluding cost of excavation but including cost of breaking the wall/ floor /chajja and making good the same . all labour materials , tools , plants etc . complete . , p & l in wall , floor . trenches etc , 20mm dia u . p . v . c pipe ( schedule 40 ) of prince make or equivalent including joining with sockets , bends , tees , specials , reducer specials of required size for connecting existing pipes , , . all cutting threading and joining materials cost pipes and specials , etc . , excluding cost of excavation but including cost of breaking the wall/ floor /chajja and making good the same . all labour materials , tools , plants etc . complete . , p & l in wall , floor , trenches etc , 25mm dia u . p . v . c pipe