... 3 Filtering Machine 4 low operation cost RO pure water equipment ItemName1Quartz sand tank2activated carbon canister3Source pump4ultrafilter5flow gauge6pressure ... electrical currentshort circuit, creepage of electricity 3).Design basis1. Source of water:tap water, if not ,pls provide ... the raw water, through the permeable membrane and into pure water, no water through the membrane, the dissolved, ...