Tender For providing of annual maintenance services for water purification and conditioning system (version 2) - potable water purification system reverse osmosis or uv based; 3 to 5; package-5 : water purifier and conditioning system maintenance involving basic servicing, ..,annual maintenance services for water purification and conditioning system (version 2) - drinking water cooler; 3 to 5; package-5 : water purifier and conditioning system maintenance involving basic servicing, filters, membranes, all electrical parts..,annual maintenance services for water purification and conditioning system (version 2) - potable water purification system with inbuilt water cooler.; 3 to 5; package-5 : water purifier and conditioning system maintenance involving basic servicing, f..,annual maintenance services for water purification and conditioning system (version 2) - ro water plant for hemodialysis; 3 to 5; package-5 : water purifier and conditioning system maintenance involving basic servicing, filters, membranes, all electr..