Hello all - been a member for a couple years and have learned a lot from the posts, but I am stumped with this current issue.
I've been battling this one for about 5 days.
After changing sand (5 years since sand replacement), I have an issue where if I'm running on Filter-mode, my starting pressure after backwash is 26 PSI and will quickly (within 2 hours) climb up into mid-30's and I have lost pressure through the system. If I BW and then switch over to Recirculate, the pressure goes to 16 PSI (the usual starting point after BW) and will run like that unabated.
In Filter-mode, there is rattling noise coming from the valve...probably air, but I have tried bleeding with no good results. I've disassembled the valve and see nothing of concern.
I've also swapped out 6-way valves to eliminate the hardware.
System:
I have an 18x40 pool (23k gallons) with a Pentair Whisperflo pump, Pentair 6-way top valve (272526 & 262506), Tagelus TA-60 sand filter, AquaRite T-9 Salt system.
Issue:
I removed the old sand and washed out the tank. Removed and cleaned the standpipe and all of the laterals. No broken laterals.
I added water up to 1/3 of the way and replaced the sand with 325 lbs. of Quikrete Pool Filter Sand. I used a sand diffuser to ensure no sand got into the standpipe.
Went to BW and Rinse and all seemed OK, but when I went to Filter, that's when I heard the noise from the valve and noticed the pressure up at 26 PSI.
Troubleshooting:
I tried bleeding air by opening the bleeder valve before each operation (BW, Rinse, Filter). No change.
I have replaced all of the suction side PVC up to the ball valves (Deep-end, Shallow-end and Drain) including a new union and threaded intake to pump housing. No change.
Replaced/greased the o-ring on Pump Lid. No change.
Replaced all 3 of the unions at the valve and replaced the valve o-ring. No change.
Replaced the pressure gauge and the bleeder valve. No change.
Swapped out the Pentair 272526 (2 years old) with an older 262506. No change.
I removed about 25 lbs of sand. No change.
I've seen posts where folks indicated a suction-side air leak, however, since my system runs perfectly on Recirculate, I would think that suction-side air leak is eliminated as a culprit.
I've also seen mention of Quikrete not being #20 Silica sand and this could be the issue. I know I've used it before (I had an old bag lying around), but I think I used ZeoSand last time.
I think my problem has to be in my sand filter tank, and I am leaning towards just replacing the new sand with ZeoSand and see if that fixes the issue.
I wanted to check with some of the experts here first. Any advice?
Thanks!
Steve
I've been battling this one for about 5 days.
After changing sand (5 years since sand replacement), I have an issue where if I'm running on Filter-mode, my starting pressure after backwash is 26 PSI and will quickly (within 2 hours) climb up into mid-30's and I have lost pressure through the system. If I BW and then switch over to Recirculate, the pressure goes to 16 PSI (the usual starting point after BW) and will run like that unabated.
In Filter-mode, there is rattling noise coming from the valve...probably air, but I have tried bleeding with no good results. I've disassembled the valve and see nothing of concern.
I've also swapped out 6-way valves to eliminate the hardware.
System:
I have an 18x40 pool (23k gallons) with a Pentair Whisperflo pump, Pentair 6-way top valve (272526 & 262506), Tagelus TA-60 sand filter, AquaRite T-9 Salt system.
Issue:
I removed the old sand and washed out the tank. Removed and cleaned the standpipe and all of the laterals. No broken laterals.
I added water up to 1/3 of the way and replaced the sand with 325 lbs. of Quikrete Pool Filter Sand. I used a sand diffuser to ensure no sand got into the standpipe.
Went to BW and Rinse and all seemed OK, but when I went to Filter, that's when I heard the noise from the valve and noticed the pressure up at 26 PSI.
Troubleshooting:
I tried bleeding air by opening the bleeder valve before each operation (BW, Rinse, Filter). No change.
I have replaced all of the suction side PVC up to the ball valves (Deep-end, Shallow-end and Drain) including a new union and threaded intake to pump housing. No change.
Replaced/greased the o-ring on Pump Lid. No change.
Replaced all 3 of the unions at the valve and replaced the valve o-ring. No change.
Replaced the pressure gauge and the bleeder valve. No change.
Swapped out the Pentair 272526 (2 years old) with an older 262506. No change.
I removed about 25 lbs of sand. No change.
I've seen posts where folks indicated a suction-side air leak, however, since my system runs perfectly on Recirculate, I would think that suction-side air leak is eliminated as a culprit.
I've also seen mention of Quikrete not being #20 Silica sand and this could be the issue. I know I've used it before (I had an old bag lying around), but I think I used ZeoSand last time.
I think my problem has to be in my sand filter tank, and I am leaning towards just replacing the new sand with ZeoSand and see if that fixes the issue.
I wanted to check with some of the experts here first. Any advice?
Thanks!
Steve