conditioning system (version 2) - drinking water cooler;upto 3; 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.; upto 3; package-5 : water purifier and conditioning system maintenance involving basic servicing, f..