The Pentair R172009 Cap O-Ring delivers the chemical resistance and durability pool service professionals demand for reliable feeder and filter maintenance. This premium Viton rubber O-ring ensures leak-free operation in Pentair Rainbow chlorinators and cartridge filters, reducing costly callbacks and maintaining your service reputation.

Professional Service Benefits

Engineered with Viton rubber construction, this O-ring withstands harsh pool chemicals and extreme temperatures that destroy standard rubber seals. The precise 3-3/4" inner diameter and 3/16" cross-section provide perfect sealing for Rainbow models 300, 302, 320, and 322, plus standard and high square feet cartridge filters. Quick installation saves valuable service time on every job.

Why Pool Contractors Choose MT Pools

Our superior customer service and daily recurring customer support ensure you have the right parts when you need them. With wholesale pricing that protects your margins and reliable inventory management, MT Pools keeps your service operations running smoothly and profitably.

Frequently Asked Questions

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Stock your service truck with genuine Pentair replacement parts from MT Pools. Our expert team provides technical support and fast shipping to keep your pool service operations profitable and efficient.