Water Factory ® SQC-3 HF RO Reverse Osmosis Drinking Water System 04-045 by 3M Purification. The Water Factory System SQC 3 HF under the counter reverse osmosis unit is a three (3) stage RO system designed for use on either chlorinated or no chlorine water supplies. The sanitary quick change cartridges enable easy water filters change with no mess. The SQC 3 HF Model can produce up to 20 gallons of pure drinking water a day and can be installed to feed an icemaker within your refrigerator. The minimum water pressure requirement of the SQC 3 HF Models is 50 psi. Uses (#1) 47-55706G2 Sediment / Carbon Prefilter, (#2) 66-4706G2 TFC HF Reverse Osmosis Membrane and (#3) 47-55710G2 Block Carbon Postfilter. Includes water storage accumulator tank, faucet and installation kit.