Pentair R1722400 Lid to Housing O-Ring | High Capacity Chlorinator

Generic O-rings often fail quickly in high-chlorine environments. The Pentair R172240 is specifically formulated to resist swelling, cracking, and chemical breakdown common in tablet feeders.

Pro Tip: Always clean the lid and housing groove before installing a new O-ring. Apply a light coating of silicone-based pool lubricant to prevent twisting and ensure smooth tightening. Avoid petroleum-based lubricants, as they degrade rubber components.

In the field, we’ve seen many chlorinator leaks traced back to worn O-rings — making this one of the easiest and most affordable maintenance upgrades available.

The Pentair R172240 lid O-ring is a simple but essential component for safe, efficient chlorinator operation. In real-world pool systems, replacing a worn seal often eliminates leaks immediately and restores proper system pressure.

It’s inexpensive insurance against chemical damage and sanitation issues. When installed correctly, it provides long-lasting, dependable sealing.

At ShastaPoolSupply.com, we stock genuine Pentair chlorinator replacement parts backed by decades of pool industry expertise. You get competitive pricing, fast shipping, and knowledgeable support from professionals who understand your equipment inside and out.

If you see water leaking from under the lid, smell strong chlorine near the feeder, or notice the lid no longer seals tightly, the O-ring may be worn or compressed. Inspect it for cracks, brittleness, or flattening. Replacing it restores a proper seal and protects your chlorination system from air and water leaks.