Water Factory ® 66-4709G2 SQC PRO C-80 Reverse Osmosis Replacement RO Membrane by 3M Purification. For use with Water Factory SQC PRO C-80 products only. The most critical component to the reverse osmosis system function, the RO membrane module provides the means of separating fresh, clean drinking water from everyday tap water. This membrane is made of a thin film composite material (TFC) and is for use on chlorinated or unchlorinated well water supplies. Provides up to 80 US Gallons of fresh water per day. Effectively reduces TDS total dissolved solids in the drinking water supply.