When the pool pump is turned off, it will not again prime on its own. Instead, I must manually prime the pump.
This problem began months ago after about an inch of mud was washed into the pool after a huge rain. It took me several weeks to get the mud out. But afterwards, I have been unable to prime the pump except to do so manually.
The pool maintenance company I use have replaced the sand filter (said it had a leak). This did not help. They then installed a 2" check valve. This also did not solve the problem.
Hayward pump with sand filter. Vinyl pool 30,000 gallons with a non-functioning (frozen) booster (Polaris) pump.
What are we missing here?