I just opened my pool and can't figure out why my sand filter is running pegged at 60+psi. I opened the sand filter to find plenty of sand in the tank. I backwashed gallons and gallons of water.... and the glass monitoring tube showed clean water.
When I shut the pump off the sand filter gauge says around 48psi....never going to zero.
This hayward sand filter is less than a year old. Any ideas of what I might try next?