Gem Bid For Reverse Osmosis Based Point Of Use Water Treatment System For Drinking Purposes (v3) As Per Is 16240 (q2) , Self - Contained Drinking Water Coolers (v3) As Per Is 1475 (q2) , Reverse Osmosis Based Water Treatment System Above 50 Lph Capacity (v2) (q2) , Household Refrigerating Appliances As Per Is 17550 (q2)