Frustrating situation - inexperienced
I have a Hayward Sand Filter S-244T with a Hayward SP 711 Vari-flo valve. Since opening the pool, I am losing water when filtering. My system does not allow me to see if there is flow through the waste line when I'm filtering. Last week, I took off the top of the multi-port and inspected the spider gasket which looked ok to me. I replaced the top and have continued to lose water. The system seems stable when the filter is set to recirc.
Questions - Should I replace the spider gasket even though it looks ok? Could it be that I just need to lubricate the gasket to create a seal? Am I missing something else?
Thanks in advance for guidance