Hi all. I'm a really new pool opener, but not totally ignorant to mechanics and water chemistry as I had a job on a pool route some years ago. However, thanks in advance for any advice you can give me about my filter issue.
The deal is that when I set the multi-port valve to backwash to backwash the filter, no water is expelled out of the backwash hose - same thing when I checked it on waste...recirculate works fine. So when I backwash, the psi does drop a little, but after I rinse and go back to filter mode, the returns blast what appears to be sand back into the pool.
I know this means I probably have a broken lateral (at least), but I was wondering if anyone might advise as to why no water comes out of the backwash hose when in the backwash setting?
I was curious if someone's expertise might help guide me before I remove the valve, sand, etc., and inspect inside the filter.