[Solved] Troubleshooting filter leak?

Tekniqe

New member
Apr 4, 2021
3
Corona, CA
[Solved - solution in comments]

Quick background. New pool owner. Had to have the tile cleaned and water drained (chemistry out of whack). Pool has been refilled, but it seems like pool service in my area is above capacity, had a couple companies not get back to me/not able to service our pool, so doing it myself. The filter is a "Pentair Clean & Clear" (see signature for equipment).

Refilled the pool, and started by cleaning the cartridge filter. After cleaning and getting everything back together and running, I noticed a small drip around the filter camp. Per the instructions, went around the clamp tapping/hitting with a rubber mallet and tightening the clamp spring/nut until the coils touched again. That drip has since stopped (as far as I can tell/observe), but I noticed that when the pump is off, there is a slight vacuum inside the filter - I can hear the air getting sucked in through the air relief valve and feel the suction with my palm/fingertip. It seems there may be a slight drip/air release from the air relief when the system is on, where the water shoots out, but might be hard to tell if it's just residual water from purging the air.

I started the system manually this morning to verify, and opening the relief valve when starting the pump took about 20 seconds before spraying water out. Not sure if I'm looking for problems/obsessing over having done the work myself, but should that be the case? Normally it's on the schedule, and nobody would be there to release the air in the filter right?

I'll be going to the local pool supply store with a water sample to begin chemicals today.
 
Last edited:

cowboycasey

Gold Supporter
LifeTime Supporter
TFP Guide
Jul 3, 2013
5,897
Southern OK
Welcome to TFP :)

I have the same filter just the 320, great filter by the way... Did you use pool lube on the o ring when putting it back together? If not grab some and use it, works great for all your O rings... use some on your pump top o ring also...

You may need to replace the air relief valve and the pressure gauge, most pressure gauges are way to high pressure marking..

30 psi pressure gauge https://smile.amazon.com/gp/product/B004IRCADG

air relief valve https://smile.amazon.com/gp/product/B001E00D8O

lets talk about this pool store thing, they are there to drain your money from you... Grab you a great test kit ( in my signature below ) and kick the pool store before you lose thousands of dollars and have a green pool :)
after a week of testing you will be a pro.. (y)
 
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Tekniqe

New member
Apr 4, 2021
3
Corona, CA
Welcome to TFP :)

Thanks for the reply! I had not applied pool lube. I took it apart again and lubed the o-ring and put it together again more carefully than last time, but still getting the hissing from the valve. Also, I noticed I'm still getting a small drip on one side. It seems to be there when starting the system, but goes away after a while. To be honest though, the drip may have been occurring already - I was more vigilant looking for leaks after cleaning the filter than I was before.

I did pick up a new air relief valve, which I can try installing and see if that resolves the problem. If it were an issue with the valve, would/could that also cause a drip in/near the filter clamp?

Regarding the pool store, mostly using the complementary water testing and to source the chemicals I need. In your experience, what's the best way to get the needed materials? The pool store is recommending a shock once a week or once every other week, depending on usage.
 

Tekniqe

New member
Apr 4, 2021
3
Corona, CA
Welcome to TFP :)

I have the same filter just the 320, great filter by the way... Did you use pool lube on the o ring when putting it back together? If not grab some and use it, works great for all your O rings... use some on your pump top o ring also...

You may need to replace the air relief valve and the pressure gauge, most pressure gauges are way to high pressure marking..

30 psi pressure gauge Amazon.com: Zenport LPG30 Zen-Tek Glycerin Liquid Filled Pressure Gauge, 30 PSI: Garden & Outdoor

air relief valve Amazon.com: Pentair 98209800 High Flow Manual Relief Valve Replacement Pool and Spa Filter: Garden & Outdoor

lets talk about this pool store thing, they are there to drain your money from you... Grab you a great test kit ( in my signature below ) and kick the pool store before you lose thousands of dollars and have a green pool :)
after a week of testing you will be a pro.. (y)
I was able to resolve the issue by taking the filter clamp off again, applying some lube to the o ring more liberally, and installing a replacement air relief valve. After that, it's working great! Also, the air relief valve I replaced was much much harder to twist open to purge air. It would take a fair amount of twisting, whereas the new one I can do with just a couple fingers twisting very lightly.
 
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