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Thread: Suction Leak? My version....

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    CUTiger78's Avatar
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    Suction Leak? My version....

    Read through a similar post and I determined that I clearly have a suction side leak, with air bubbling out of all of the returns.

    So, somewhere between the skimmer and the impeller, air is getting into the system. I've been pretty systematic and figured out where it isn't by process of elimination - the O-ring on the pump strainer basket lid is new & well lubed, drain plug lubed & tightened, etc.

    My only remaining guess is the stem from one or both of the gate valves that control the flow from the 2 skimmers. I've tightened the gland nuts, even though they didn't show any signs of leakage, pump on or pump off. One of the valves releases a little bit of water (maybe 2 tbs.) when I shut the pump off. I guess I'm reluctent to believe that such a small leak could be the cause of so much air into the system.

    Think I need to repack the stem with new plumbers tape?

    Any other thoughs?

    Thanks!
    36K gallon 42X22 gunite/plaster kidney-shaped IG;
    1 hp Hayward Super Pump (new in 2012);
    Hayward S244T sand filter w/ Zeosand (both new in 2009);
    175K BTU LAARS Lite2 LG natural gas heater; Polaris 380;
    TF-100 test kit.

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    Mod Squad Bama Rambler's Avatar
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    Re: Suction Leak? My version....

    You'd be surprised how much air a tiny water leak will allow in. In fact you can have a good sized air leak and it never drip a drop of water.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
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    Mod Squad JohnT's Avatar
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    Re: Suction Leak? My version....

    Quote Originally Posted by CUTiger78
    One of the valves releases a little bit of water (maybe 2 tbs.) when I shut the pump off. I guess I'm reluctent to believe that such a small leak could be the cause of so much air into the system.

    That's your problem. Ever tried to drink through a straw with a pin hole in it?
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    CUTiger78's Avatar
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    Re: Suction Leak? My version....

    Quote Originally Posted by JohnT
    Ever tried to drink through a straw with a pin hole in it?
    Ahhhh, great analogy. I get it. Well, plumbers tape on the stem it is. I'll get to it this weekend and report back.

    Thanks!
    36K gallon 42X22 gunite/plaster kidney-shaped IG;
    1 hp Hayward Super Pump (new in 2012);
    Hayward S244T sand filter w/ Zeosand (both new in 2009);
    175K BTU LAARS Lite2 LG natural gas heater; Polaris 380;
    TF-100 test kit.

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