Response to I have a Hayward Pro Series High Rate Sand Filter Model S-310-S with a SP715x62 2"Vari Control Valve Assembly with guage. I have sand in our inground pool and wonder if this could be caused by a bad spider gasket? I notice some water accumulation at the top of the valve. Earlier this year, I replaced the the bottom elbow assembly and the the lateral holder assembly and replaced the sand.

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