I have a Hayward 244T with top mount SP0714T valve. When I bought the place a couple years ago, I could tell the valve gasket was going out as I was having problem with water balance and leaking out to waste or recir.
I recently replaced the valve assembly since the gasket doesn't come separate. After running the pump with the new valve, the water cleared up nicely (even with all the pollen).
I decided to do a backwash and rinse. During the backwash the water in the backwash glass cleared up nicely. Once I switched it to rinse, the backwash glass half filled with sand. A good amount of sand was dumped in the pool as well, but stopped after a short bit.
I pulled the valve to check everything and all seemed fine. Ran another backwash and rinse with the same result.
Would cracked/broken laterals cause this? I was under the impression this would wash sand into the pool continually in filter setting.
Any ideas? TIA