After a week of mystery puddles around the pool we've now found out that when on filter our filter is also pumping water out the backwash discharge! We were pool free for about two years so the filter and pump were drained, covered and sat... I know there is a loose lateral because we'll get some sand in the pool from the filter, but I was wanting to wait until the end of the season to tear everything about. Apparently that changed! LOL
This is an intex sand filter, am I correct in suspecting the spider gasket?
Thanks so much!