KnappRO Chicago Water Filter Elements

High-performance reverse osmosis membranes and water treatment components for industrial, commercial, and municipal applications. Fast U.S. shipping with expert support.
Volume Discounts Available
• 6–11 units → 3% off
• 12–24 units → 6% off
• 25+ units → 9% off
Discounts apply automatically at checkout.

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Brackish & Seawater RO Membranes | Reverse Osmosis Filters – KnappRO Chicago

Brackish and seawater RO membranes are essential for high-quality water filtration in industrial, commercial, municipal, and desalination applications. At KnappRO Chicago, we stock premium reverse osmosis membranes from trusted brands including FilmTec, Hydranautics, LG, DuPont, Toray, and Suez.

Our collection includes high-rejection 8-inch and 4-inch RO membranes designed for brackish water, seawater, and tap water systems. Whether you need energy-efficient operation, long membrane life, or cost-effective replacements, we help you select the right model for your system.

Browse our full selection of brackish water RO membranes or seawater RO membranes. Need help choosing? Contact our knowledgeable team for expert support.

What Is Reverse Osmosis?

Learn how reverse osmosis works and why it removes up to 99% of contaminants from your water — perfect for your home or business.

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