R.O. UltraTec’s newest residential membrane is the 150 gal per day (gpd) Thin Film Composite element. It is manufactured with the industry’s leading Film Technology membrane flat sheet and is spiral wound to fit all standard size residential membrane housings. This new 1.8” x 12” membrane element produces 150 gpd at 65 psi with a nominal rejection of 98%. R.O. UltraTec’s TF membranes are integrity tested and shipped “dry” for longer shelf life and are now NSF 58 approved.