ANNUAL MAINTENANCE SERVICES FOR WATER, PURIFICATION AND CONDITIONING SYSTEM, Version 2-, Drinking Water ATM/ Water Vending Machine; 3 to 5;, PACKAGE- 5: Water purifier and conditioning system, maintenance involving basic servicing, filters, membranes,.., Potable Water Purification System Reverse Osmosis Or UV, Based; 5 to 7; PACKAGE- 5: Water purifier and conditioning, system maintenance involving basic servicing