2-Pack Chlorinator Lid Replacement O-Ring For Pentair Rainbow Models 300/320 R172009 O-283 2 Pack

When the spa filter pump finally purges the air from the system and water fills the filter body up to the lid, it leaks 360 degrees at the seal until surface tension and/or the seal expands which causes the gasket to work and all the leaking water stops. Just be prepared that this will happen.

Works as intended.

The old ring had deteriorated with age and the local shops wanted more than I wanted to pay, this pack was at a great price and the ring dropped right in.

just what I needed

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Well, the title pretty much says it all.I bought a house with an existing in-ground pool and the pump set was at least 10 years old. When the last time this o-ring was changed, I don't know. When I inspected it, it was rotten and crumbling. This o-ring set is a perfect fit for the Pentair Rainbow Model 320 cap. I put a little silicon lubricant on the o-ring and placed in inside the cap and I expect I'll be an old man before I need to use the 2nd o-ring in the package.

I have purchased these before and they fit perfectly into my chlorinator. The chlorinator, with excess chlorine, chews up the gaskets every 1-2 years I have to replace the gaskets and these are perfect.

Sticker on package does not match the advertised product. Now it says the item is non-returnable & no refund - very unhappy! I have no idea what the item they sent is good for- does not match what was advertised. The o-rings are way too big. Tell TORK they owe us a refund. If they were honest, they would. ZERO stars.