Reverse Osmosis System Filters, RO Membranes and Parts

Delta Fresh US-1 Water Filters

Delta Fresh US-1 Water Filters

Delta Fresh ® US-1 Reverse Osmosis System Replacement Water Filters And CTA Reverse Osmosis RO Membranes.

DELTA FRESH REVERSE OSMOSIS SYSTEMS USE SLIM-LINE REPLACEMENT O-RINGS AND REPLACEMENT FILTER HOUSING SUMPS. THEY ORIGINALLY CAME WITH A 3.2 GALLON TANK. WE CARRY ALL THE REPAIR PARTS, FAUCETS, TANKS, FILTERS, RO MEMBRANES, VALVES, TUBES AND CONNECTORS FOR ALL OF THE DELTA FRESH REVERSE OSMOSIS SYSTEMS.

Minimum filter change is every 6 months for the sediment prefilter and every 12 months for all carbon filters.  Change more often if your usage is higher than normal or you have bad incoming source water.

Easy TDS Membrane Performence Calculator
See If It is Time To Replace Your Membrane

Simply enter your Feed Water TDS and RO Water TDS into the boxes above and click "Submit". The percentage of TDS Rejection will be displayed. We normally recommend membrane replacement once you drop below 75%. This may vary in areas with high TDS in the feed water.

See our selection of TDS meters under Water Tests


* Delta Fresh ® is the registered trademark of Delta Fresh, the manufacturer of Delta Fresh ® brand water treatment equipment. The replacement filters and membranes listed above are not manufactured or endorsed by Delta Fresh. Rather, these filters and reverse osmosis membranes are manufactured by other companies. While these filters and ro membranes are compatible for use in Delta Fresh ® reverse osmosis systems and water treatment equipment, we make no representation as to whether using these filters and membranes is consistent with the warranty and specifications applicable to Delta Fresh ® water filter equipment. This includes compatible replacement sediment water filters, replacement Carbon Block Water Filters, GAC Carbon Filters, AICRO Inline Post Filters, CTA RO Reverse Osmosis Membranes, Sediment Pre Filters, faucets, water tanks, valves, pumps, UV Ultraviolet and water testing supplies.