Spider Gasket Deteriorating

[IASteve]

I’ve been getting about 2 years per spider gasket on a 2” Sta-Rite multi valve. It turns gummy, sticky, and starts falling apart where it comes in contact with the water on the filter setting. I’m assuming this is from the chlorine. I don’t use any other chemicals. I use Pentair branded replacements.

Is this normal?

 

[Texas Splash]

Is this normal?

No, that's too fast. Can we assume you are shutting the system off before changing settings?

 

[duraleigh]

Normal gaskets last 8-10 years plus and easily resist the level of chlorine in a normal pool. There is either something wrong with the gasket material (try another brand, maybe) or some other ingredient has been added to your pool that is attacking the gasket.

 

[IASteve]

Yes to turning off the pump before switching settings.

Thanks for the replies. I’ll find another brand.

 

[Texas Splash]

I’ll find another brand.

Since you'll be opening the MPV, give that valve a good inspection to ensure there's not something wrong with the valve itself tearing-up the gasket. Shouldn't be, but you never know I guess.