Reverse Osmosis Water Filter Replacement Cartridges and Kits

Reverse Osmosis: a water purification technology that utilizes a semi-permeable membrane to remove microscopic particles (typically anything larger than 0.001 microns in size) from drinking water.

Select what type of reverse osmosis filter part you’re searching for (system, filter, etc.) and browse or search through hundreds of our reverse osmosis water filters, systems, membranes, and other water filter parts. Choose from some of the industry’s top reverse osmosis brands including, Watts®, Hydrologic, Hydrotech, and Water Factory Systems.

Not sure if investing in a reverse osmosis water filter is what you want, then check out our thousands of other popular water filters, including whole house, under sink, faucet filters, and many more.

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  1. CQE-RC-04006 Crystal Quest Fluoride Water Filter

    Price $63.99 List Price Price $91.99 Save 30%
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  2. CQE-RC-04049 Crystal Quest Fluoride Multi Replacement Filter Cartridge

    Price $63.99 List Price Price $91.99 Save 30%
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  3. Crystal Quest 2-7/8 in x 20 in Calcite & Coconut Shell GAC Filter Cartridge

    Price $95.99 List Price Price $137.99 Save 30%
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  4. CQE-RC-04020 Crystal Quest Nitrate Water Filter Cartridge

    Price $159.99 List Price Price $228.99 Save 30%
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  5. CQE-RC-04016 Crystal Quest Multi Stage PLUS Water Filter Cartridge

    Price $159.99 List Price Price $228.99 Save 30%
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  6. CQE-RC-04003 Crystal Quest Multi Stage ULTRA Water Filter Cartridge

    Price $82.99 List Price Price $118.99 Save 30%
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  7. CQE-RC-04051 Crystal Quest Arsenic Multi Replacement Filter Cartridge

    Price $82.99 List Price Price $118.99 Save 30%
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  8. CQE-CT-00142 Crystal Quest Countertop Reverse Osmosis Filter System

    Price $172.99 List Price Price $247.99 Save 30%
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