Hello, I believe my spider gasket is leaking. When my pump shuts down I can hear water moving through the multipart valve with my ear close to it. Also in the morning my system has lost pressure and the pump must prime itself again each day. I think I can install a spider gasket, has anyone here replaced one on this type of valve. Mine is about 10 years old but it is installed in an enclosed pool house that does not see the sun or rain. Just looking for advice before I replace the entire valve and also where is the best online place to purchase.