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Membranes & Filters

Shop replacement membranes and filters for reverse osmosis, ultrafiltration, and nanofiltration systems. We carry membranes from top manufacturers including Filmtec (DOW), Hydranautics, Toray, Axeon, and LG NanoH2O, plus membrane housings from Codeline and Wave-Cyber. Also available: sediment filters, carbon cartridges, and specialty filter media.

Frequently Asked Questions

What is the difference between FILMTEC and Hydranautics membranes?

FILMTEC BW30 is the industry standard for brackish water with 99.5% salt rejection. Hydranautics CPA/ESPA offers higher flux rates. Both available at ForeverPure.

What is the difference between 4040 and 8040 membranes?

4040 is 4 inches diameter by 40 inches long (~100 sq ft area). 8040 is 8 inches by 40 inches (~400 sq ft, 4x capacity). Small systems use 4040; commercial/industrial use 8040.

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