bids are invited for annual maintenance services for water purification and conditioning system (version 2) - 500 lph; 5 to 7; package-5 : water purifier and conditioning system maintenance involving basic servicing, filters, membranes, all electrical parts including pum.. , annual maintenance services for water purification and conditioning system (version 2) - 1000 lph; 7 to 9; package-5 : water purifier and conditioning system maintenance involving basic servicing, filters, membranes, all electrical parts including pu.. , annual maintenance services for water purification and conditioning system (version 2) - 250 lph; 7 to 9; package-5 : water purifier and conditioning system maintenance involving basic servicing, filters, membranes, all electrical parts including pum.. , annual maintenance services for water purification and conditioning system (version 2) - 100 lph; 5 to 7; package-5 : water purifier and conditioning system maintenance involving basic servicing, filters, membranes, all electrical parts including pum.. , annual maintenance services for water purification and conditioning system (version 2) - 20/25 lph; 5 to 7; package-5 : water purifier and conditioning system maintenance involving basic servicing, filters, membranes, all electrical parts including p.. , annual maintenance services for water purification and conditioning system (version 2) - 40/50 lph; 5 to 7; package-5 : water purifier and conditioning system maintenance involving basic servicing, filters, membranes, all electrical parts including p.. , annual maintenance services for water purification and conditioning system (version 2) - 10/15 lph; 5 to 7; package-5 : water purifier and conditioning system maintenance involving basic servicing, filters, membranes, all electrical parts including p..