bids are invited for annual maintenance services for water purification and conditioning system ( version 2 ) - potable water purification system reverse osmosis or uv based; upto 3; package-5 : water purifier and conditioning system maintenance involving basic servicing, .. , annual maintenance services for water purification and conditioning system ( version 2 ) - potable water purification system reverse osmosis or uv based; 10 and above; package-5 : water purifier and conditioning system maintenance involving basic servi.. , annualmaintenance services for water purification andconditioning system ( version 2 ) - drinking water cooler;3 to 5; package-5 : water purifier and conditioning systemmaintenance involving basic servicing, filters, membranes, all electrical parts.. , annual maintenance services forwater purification and conditioning system ( version2 ) - drinking water cooler; 10 and above; package-5 :water purifier and conditioning system maintenanceinvolving basic servicing, filters, membranes, all electrical.. total quantity :