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Thread: Leak at bottom of filter

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    Leak at bottom of filter

    I've been noticing that I have been adding more water to the pool than normal. I have a pool cooler setup on one of the returns and figured it was just due to evaporation as the humidity has been fairly low the last few weeks. Today I noticed that my slab is wet where all of my pool equipment is. I was able to determine that the leak is coming from under the filter. I can see it dripping under there, but I can't determine if it's a plumbing connection or the shell that's leaking.

    Is this common? I'm assuming that I will need to disassemble the filter and disconnect it from the multi valve to get under there to determine the source of the leak. Any ideas?

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    Re: Leak at bottom of filter

    You'll have to at least let us know what type of filter you have, or even better, a picture of the leaking filter in action.
    Factory Warranty Station for:
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    and Paramount pool cleaning systems.

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    Re: Leak at bottom of filter

    Sorry, I just realized that my post count has reset to zero and my sig, which listed all of my equipment, is gone.

    I have a Pentair FNS 48 filter. A picture really wouldn't do any good right now as the source of the leak is obscured by the base of the filter. The more I think about it, the leak is almost surely at the plumbing underneath. If the shell were compromised, I would imagine I would have water shooting out due to the pressure inside the filter.

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    Re: Leak at bottom of filter

    If the shell were compromised, I would imagine I would have water shooting out due to the pressure inside the filter.
    Yep! You may be even able to trace the leak higher up on the filter if you can't find it down around the drain.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Leak at bottom of filter

    Quote Originally Posted by jtupper
    I have a Pentair FNS 48 filter. A picture really wouldn't do any good right now as the source of the leak is obscured by the base of the filter. The more I think about it, the leak is almost surely at the plumbing underneath. If the shell were compromised, I would imagine I would have water shooting out due to the pressure inside the filter.
    Can you see the plug at the base of the filter just below the inlet? It may be the o ring that seals that plug. Or it could be the inlet or outlet o ring(s) leaking and is running down to the base before it drips.
    Factory Warranty Station for:
    Jandy, Pentair, Sta-Rite, Raypak, Polaris,
    and Paramount pool cleaning systems.

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    Guest

    Re: Leak at bottom of filter

    Thanks for the input guys. It's about time to pull it apart to clean the filters anyway so this will get me off my butt to go ahead and do it. Hopefully, everything will hold as-is until Friday when I have a chance to get to it.

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    Re: Leak at bottom of filter

    Geez, I'm a dumb*****!!

    I can't even keep up with my user ID's. This would explain why my post count was at zero...I was logged in as the wrong person.
    Pool Specs:
    16,000 gal. IG - Plaster - Auto Chlorinator
    FNS 48 DE Filter - 2HP Centurion Pump (A.O. Smith)
    Hayward HeatPro Heat Pump - Polaris 360

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    Re: Leak at bottom of filter

    You aren't supposed to have more than one account, so I removed your jtupper identity.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Re: Leak at bottom of filter

    To be honest, I don't remember creating that account. Thanks for cleaning up my mess.
    Pool Specs:
    16,000 gal. IG - Plaster - Auto Chlorinator
    FNS 48 DE Filter - 2HP Centurion Pump (A.O. Smith)
    Hayward HeatPro Heat Pump - Polaris 360

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    Re: Leak at bottom of filter

    I read your other post about the pump loosing prime and commented, i my case its that dare FNS48 filer, got the same model, leaked under the bottom since i bought this house in Aug '09 i figured yours was doing the same, looks like it was your mulitport valve BUT i dont trust my filter and i'll bed you had/have the same bottom leak i do/did THe dry Nevada air evaps the hidden leaking water untill the problem gets bad, then the wet concrete reveals it.
    20,000 gal. 32' x 17' freeform custom pool, 3ft. shallow - 8ft. deep end, Pentair Whisper flow 2.2 HP WF-6, Purex/Triton Nautilus FNS48 DE filter, 2 Intex Chlorine Generators (retired) SR Smith Rouge Rapids curved slide, The Pool Cleaner 4-wheel model w/Hayward large leaf canister. Tightwatt pool timer Spa: Beachport 5 person/350gal. Wishlist: move Neiko Tools pump to slide, solar system, Fountain, Automation. http://www.poolcalculator.com/

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