Diverter valve o-rings prematurely fail

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Steve_K

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Bronze Supporter
Dec 12, 2013
24
San Diego, CA
The o-rings on my Pentair diverter valves wear out in about 6 months and then start leaking profusely. When the pool was first built, I seem to remember the original o-rings lasted about 2 years.

So, either the replacements I purchased from Captain O-rings aren't the best quality, or I'm installing them wrong, or my expectations exceed reality.
Before installing the new O-rings, I thoroughly clean the valve stem and housing, cover everything with fresh silicon lube, insert the 2 new O-rings along with a plastic spacer between them.

Any suggestions where to purchase quality O-rings, other than from Pentair that charges $6 per O-ring? :ROFLMAO:

Thanks
 
I just finished replacing the leaky O-rings and they were beginning to disintegrate. Lots of black material came off them.

BTW, this diverter valve sends water to my solar panels and is controlled by a motor and thermostat. So, the diverter valve cycles back and forth maybe 10 times a day during the cooler spring and fall days to heat the pool.

I wonder if O-rings just aren't meant for this kind of frequent friction. O-rings are typically used in a static environment.
 
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