When vacuuming my pool, everything works fine for about 10 minutes. After that, dirt comes from the return line back into the pool. The sand filter is working to some degree, as when I backflush it, the water is very dirty. It is not sand going into the pool. HELP...
Pool filter issues when vacuuming
- Thread starter gresta46001
- Start date
I have issues like this sometimes when the spider gasket in my multiport valve is not seated properly. I sometimes will get 'waste' water returning into the pool while I am vacuuming which spills dirt back into my pool.
Thanks, I checked the spider gasket, and it needs replaced. That will probably fix the issue.
Is the filter pressure significantly higher when the dirty water starts returning to the pool? If so, here's a possibility: You start vacuuming with a clean filter and everything works like it should. As the filter gets dirty, the filter pressure rises, and a weak multiport gasket allows dirty water to bypass the filter and return directly to the pool.
my pool has done the same thing all summer. i had to replace the pump and ever since i done that when i vacuum dirty water comes back through the jets. i stop and backwash and start again and it works fine for a while, then it the dirty water comes back through the jets again. how do i check to see if it is a bad multiport, or is this something i have to get a pool guy to come and do?