AquaView 020 Sand Filter issues

May 14, 2017
It all started with sand in the pool...a visit to google and our closest retailer got us a new underdrain assembly, o ring & square o ring). Then there was a small amount of water (steady)in the backwash hose while it was in filter setting. So we changed the spyder gasket. (My husband has openly admitted to changing valve positions without turning off the unit😔). Then there was a larger amount of water in all positions. We took the unit a part, reassembled and now recirculate works but there is still a large amount of water in the backwash hose on all other settings, even closed. Not sure where to go from here. Any suggestions and help would be appreciated!!