Hi, long time reader first time poster. I have this exact problem with the same model filter. Mine has a Hayward Vari-Flo XL valve, which does indeed have a replaceable spider gasket. I’ve been experiencing small leaks for a couple of years, usually resolved by jiggling the handle. Water pouring out after backwash this year. I have replaced everything not made of plastic in my valve and still it’s pouring water. That’s the spider gasket, key base gasket, spring, spring washers, handle o-rings, and the plastic washer under the handle. And still it’s gushing water in filter mode after backwashing. I can make it stop by putting it to closed or winter and letting it sit for a while and checking for the backwash flow to stop before turning back to filter. I can hear what sounds like bubbling/draining when I have it to closed/winter so maybe a suction issue? I’ve taken the valve apart twice now (once for the spider gasket and again today to replace the spring and o-rings), and all the plastic surfaces are nice and smooth and clean. I lubed up the gaskets. I really don’t understand what else could be the problem. About to just buy a whole new valve but fail to see what’s wrong with the one I have.
Any advice would be greatly appreciated!
Any advice would be greatly appreciated!