Pentair Challenger housing O-ring/Square ring question


LifeTime Supporter
Feb 19, 2008
Tidewater, VA
Hi Everyone,

I'm rebuilding a Pentair Challenger and I ordered a new housing O-Ring but what I received was a square ring (it says "new style"). Are these interchangeable or did the housing design change at some point?



TFP Expert
Platinum Supporter
LifeTime Supporter
In The Industry
Feb 13, 2012
Phoenix, AZ
Is your old O-ring rounded? It looks like the user manual for the Pentair Challenger does, in fact, say its a square ring. I would imagine the new ring you got will work just fine.
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