tender for maintenance of sajal dhara as per work order issued time to time.. , maintanance of sajal dhara as per work order issued time to time. , maintanance of entire installation including back wash,cleaning of site , checking of valves and pipes,cheaking of electrical connections,replacement of damaged valves,bib cocks and any other parts of all units as and when necessary,repair/ replacement of pumping machinary i.e controllar,pv panel starter,wearing,switches etc as and when necessary. , complete overhauling of oxidation vessel , pre filter vessaleas and when required by engagement of labour and equipments ( the work to be executed on written permision from the engineer in charge )which includes a) complete removal of media from the vesseils , breaking of clods and through washing and clening of all media. b) placement of all media with 10% fresh new media ( lost during washing ) including cost and carrige of the fresh new media. , complete replacement of mno2 and green sand in the oxidation vessel and prefilter vessel as and when required by engagement of labour and equipments ( the work to be executed on written permission from the engineer in charge ) which includes complete removal of old media from the vessels and placement of new medid including cost and carriage , complete replacementof arsenic media in the each arsenic vessel as and when required by engagement of labour and equipments ( the work to be executed on written permission from the engineer in charge ) which includes complete removal of old media from the vessels and placement of new media including cost and carriage , 350mm dia vessel , complete replacementof arsenic media in the each arsenic vessel as and when required by engagement of labour and equipments ( the work to be executed on written permission from the engineer in charge ) which includes complete removal of old media from the vessels and placement of new media including cost and carriage , back washinng of sajal dhara , 1½ inch elbow , 1½ inch tee , 1½ inch socket , 1½ inch key , 1½ inch trunk nipple , 1½ inch union , 1½ inch mta , 1½ inch fta , 1½ inch pachover , 1½/1 elbow , 1½/1 tee , 1½/1 socket , 1inch elbow , 1 inch tee , 1 inch socket , 1 inch key , 1 inch trunk nipple , 1 inch union , 1 inch mta , 1 inch fta , 1 inch pachover , 1½ -1/2 elbow , 1½ - 1/2 tee , 1½ - 1/2 socket , ½inch tee , ½inch socket , ½inch key , ½inch trunk nipple , ½inch union , ½inch mta , ½inch fta , ½inch pachover , ½inch elbow , bib cock pvc , havac , taplon tape , pvc pipe glue , filter jumbo , 250 mm dia vessel , 8040 membrane diw point , membrane housing , 1 hp pump (crompton) , multi port valve(mpv) , brass valve