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Replacement O-Rings for Filter & Membrane Housings
O-rings may be small, yet they play a big role in keeping your filtration system running clean and dry. A worn seal can invite drips, pressure loss, and messy housing changes, especially during routine cartridge swaps. Fresh O-rings help your filter housings seat properly so water flows where it should. iFilters makes it easy to find the right fit for common housings and membrane vessels. Browse options that match your setup and keep maintenance simple.
About O-ring Products
O-rings are circular seals designed to sit in a housing groove and create a water-tight barrier once the sump and cap are tightened. Many filtration systems rely on them, including standard 10-inch drinking water housings, big blue style housings, and reverse osmosis membrane housings. Material choices like Buna-N are popular for general water applications because they balance flexibility with durability. Replacing an O-ring is often a quick fix that can restore a proper seal after years of compression, drying, or minor damage. Keeping a spare set on hand helps you stay ready for filter changes and unexpected leaks.
Why Choose iFilters for O-rings?
iFilters carries O-rings for a wide range of housing sizes and brands, so you can shop with fewer guesses. Product listings help you match seals to specific housings, which reduces the chance of ordering the wrong diameter or thickness. Many options come in multi-packs, which is handy for multi-stage systems or scheduled replacements. In stock availability supports faster maintenance, whether you are servicing one under-sink unit or several housings in a larger setup. That mix of selection and convenience helps you keep your filtration system sealed with confidence.
Shop O-rings online today!
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Replacement O-Ring for the Hydronix HF45 filter housings. Made from durable Buna-N material. This replacement O-Ring is made to be used with the Op...
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Replacement O-Ring for the Hydronix HF2, HF3 and HF4 filter housings. These replacement O-Rings are made to be used with the Opaque or Clear HF2, H...
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Flowlok leak detector replacement pads. Pack of 2. The Flowlok leak detector automatically shuts off the water when a leak occurs. This Flowlok dev...
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This 3 pack O-Rings by iFilters are used to seal water filter housings. It has an ID of 5-1/2" and OD of just over 5-3/4 inches and is made of nitr...
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This 3 pack O-Rings by iFilters are used to seal water filter housings. It has an ID of 3.5" and made of nitrile butadiene rubber (Buna-N) for flex...
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Replacement O-Ring for the Hydronix HF5 filter housings. Made from durable Buna-N material. This replacement O-Ring is made to be used with the Opa...
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The FM-25W bracket fits housings that use 4.5" OD filters. It is also designed to work with housings with pressure relief buttons such as the HF45 ...
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Heavy-Duty Commercial-Grade Bracket. Fits Hydronix HF2, HF3, & HF5 Commercial Housings. Direct Replacement for Flowmatic (Watts) 4200, 4500 and...
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Hydronix FM-45-3STND Triple Housing Stand Bracket For Whole House or Hydroponics Filtration Systems
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Hydronix FM-45-3STND Triple Housing Stand Bracket – Whole House & Hydroponics Filtration Systems The Hydronix FM-45-3STND is a durable, powder-...
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Hydronix EC-GASKET – Replacement Gasket for EC Series Empty Reusable Filter Shells The Hydronix EC-GASKET is a high-quality Buna-N replacement gask...
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Replacement O-Ring for the Hydronix MH03 Membrane Housings. Made from durable EPDM material. This O-Ring is for the housing unit and not the Cap. F...
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Hydronix SPV-40CAPORING - Cap O-Ring for 4" SPV RO Vessel OEM Replacement O-Ring for Hydronix 4" SPV Stainless Steel RO Pressure Vessels The Hydron...
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Replacement O-Ring for the Hydronix MH03 Membrane Housings Cap. Made from durable EPDM material. This O-Ring is for use on the housing Cap. For the...
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Hydro Guard HDG-005 Replacement O-Ring – Perfect Fit for HDG-45 Drop-In Style RO Housing Ensure a leak-free seal and maintain the efficiency of you...
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MRH-7-ORING replacement O-Ring for Hydronix 7 Round MRH Housings. Made from durable EPDM material.
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