Quote Originally Posted by PoolDoc View Post
The gasket material is very important. Some common rubber materials used with potable water are not at all compatible with the high level of chlorine found in 'leak-back' from a trichlor feeder. Nitrile rubber and neoprene are both common but are not at all resistant to acidic solutions of chlorine. EDPM is much better, but Viton (a fluorocarbon) is best. When I've installed valves in commercial settings, Viton was always my go-to elastomer if it was available. I think that particular check valve does have a Viton O-ring seat (often a weird brown color).


Anyhow, I'm glad the check valve you had turned out not to be a problem.
I actually couldnt see any color for the gasket on the new check valve. It was hard to reach my finger all the way in and I know there must be some sort of gasket, but i couldnt see it or feel it. The directions on this valve specifically mention stopping corrosive liquids/gasses, so that gives me hope that it will last some length of time. I'll update in a few weeks to see how it is lasting.

Hopefully, the FLO valve i used last year that surely failed within a few weeks didn't really mess my filer up too much