CUNO Water Factory 4000  3 Stage CTA RO Reverse Osmosis Premium Replacement Water Filters and RO CTA Reverse Osmosis Membrane

Replacement water faucets, accumulator holding water tanks, water filter cartridges, pre filters, post filters, sediment filters, carbon block filters, GAC filters, RO membranes, O-rings, Filter Housing Spanner Wrenches, Valves, Water Pumps and reverse osmosis drinking water system replacement parts.  Be sure to have a TDS tester to check the performance of your RO Reverse Osmosis membrane as listed below.

CUNO Water Factory 4000-CTA   3 Stage CTA Reverse Osmosis System
• Previously used for city supplied water as they are chlorine tolerant.    CTA (cellulose triacetate) membranes have been being replaced by newer technology TFC (thin film composite) membranes.  TFC RO Membranes cannot be exposed to chlorine as it will destroy the membrane and therefore they use a carbon prefilter to remove the chlorine prior to reaching the membrane.  While we do offer replacement CTA membranes we recommend that you update your system to a current TFC membrane.

• If you use the CTA RO membrane then you will want to order the sediment prefilter.
• If you upgrade to the TFC membrane then you will need to use the following carbon block prefilter.

CUNO Water Factory 4000 CTA Reverse Osmosis Drinking Water System Owner's Manual

NOTE-Membrane housing must be replaced.  OEM housing will not open to accept a new RO membrane. You will also need to order the matching flow restrictor and check valve below.  Remove and discard the old red SFC "Stealth Flow Control"  from the drain line and replace with new tubing)

Order the following repalcements for your Water Factory 4000-CTA RO system: