Replacement O-Rings for Filter & Membrane Housings

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!