Tender For providing of annual maintenance services for water purification and conditioning system (version 2) - drinking water atm / water vending machine; 5 to 7; package-5 : water purifier and conditioning system maintenance involving basic servicing, filters, membranes,..,annual maintenance services for water purification and conditioning system (version 2) - potable water purification system reverseosmosis or uv based; 5 to 7; package-5 : water purifier and conditioning system maintenance involving basic servicing, ..