Sand filter problems after sand change and lateral replacement

[elaine murphy]

Looking for suggestions. I recently changed sand, found cracked laterals, and replaced both as well as the key handle on my Hayward Sand filter. I did a 2 minute backwash, and found a lot of sand that didn’t dissipate with a rinse. Backwashed a couple more times, no change. For next 2-3 days I found decreasing amounts of sand in my pool, which cleared up til I backwashed a week later…again, site glass clear during backwash and full of sand during rinse. Found some sand in pool when vacuuming with bot, seems to be decreasing amounts daily. Any suggestions? I added water before placing laterals, standpipe lined up fine when I put multiport valve on. Puzzled and frustrated. TIA!

 

[Bperry]

Looking for suggestions. I recently changed sand, found cracked laterals, and replaced both as well as the key handle on my Hayward Sand filter. I did a 2 minute backwash, and found a lot of sand that didn’t dissipate with a rinse. Backwashed a couple more times, no change. For next 2-3 days I found decreasing amounts of sand in my pool, which cleared up til I backwashed a week later…again, site glass clear during backwash and full of sand during rinse. Found some sand in pool when vacuuming with bot, seems to be decreasing amounts daily. Any suggestions? I added water before placing laterals, standpipe lined up fine when I put multiport valve on. Puzzled and frustrated. TIA!

Sand coming out of the jets is getting through the laterals or got in during replacement.

Sand coming out of the waste port during backwash is more “normal” if it was overfilled.