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Thread: Liquidator flow issue

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    Join Date
    Jun 2014
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    Casselberry, FL
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    Liquidator flow issue

    Hey all,

    So I've had my liquidator for about a month and it's been working fine for the most part...but just recently, it stopped taking in water and now there isn't enough water in the tank to keep the Out float open. The only thing that's changed is that I have a pretty bad leak underneath my pump which I assume is coming from the shaft seal. Is that type of leak enough to bork up the Liquidator flow and will this be resolved once I address the leak, or should I be looking for another issue entirely?
    18-20k gallon in ground pool w/gunite surface
    Leslie's Crystal Clear II DE filter - DE-LE-42054 - 96gpm
    Hayward Super Pump with AO Smith UST1102 1.0HP motor
    Non-SWG

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    Re: Liquidator flow issue

    I would think that if you have enough pressure to return water to the pool, then it would be enough pressure to push flow through the in-flow line of the Liquidator, but it maybe dependant on where the tap is. Could be that there isn't enough pressure to open the check valve. Check both in-flow line's check valve and shut off valve for blockage. Try taking off the in-flow at the return plumbing tap and see if water is being pushed out. If you get water, then try connecting a line directly to the Liquidator without the check valve.
    30,000 gal, 20 x 40 ft vinyl, IG, installed 2006
    1 HP WhisperFlo pump, 60 sqft Pentair Quad D.E., Liquidator(8 gallon) with 3/8 upgrade,TigerShark cleaning robot
    TFTestkits TF-100 with SpeedStir,WS
    A proud practitioner of TFP since 2013

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    Mod Squad Bama Rambler's Avatar
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    Re: Liquidator flow issue

    What was the filter pressure before and now?
    How is the flow volume out of the return(s) compared to when it was working?

    If the flow and pressure is low enough there won't be enough flow into the LQ to keep it full.
    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
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: Liquidator flow issue

    Turns out that it was the in-line check valve. When I disconnected and reconnected the line, the flow started up again just fine. After about a week of it working, today I noticed that it was flowing at about half rate again, so this time I removed the check valve entirely, connected the line directly to the LQ and my flow was back to full. Obviously w/o the check valve there though, I'm now seeing the LQ lose water when the pump is turned off. Are there any concerns I should be aware of because of that, or is it basically harmless?
    18-20k gallon in ground pool w/gunite surface
    Leslie's Crystal Clear II DE filter - DE-LE-42054 - 96gpm
    Hayward Super Pump with AO Smith UST1102 1.0HP motor
    Non-SWG

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    Re: Liquidator flow issue

    Quote Originally Posted by gamble007 View Post
    T I'm now seeing the LQ lose water when the pump is turned off. Are there any concerns I should be aware of because of that, or is it basically harmless?
    Mine has been doing that for the past two seasons now and I haven't seen any problems.
    30,000 gal, 20 x 40 ft vinyl, IG, installed 2006
    1 HP WhisperFlo pump, 60 sqft Pentair Quad D.E., Liquidator(8 gallon) with 3/8 upgrade,TigerShark cleaning robot
    TFTestkits TF-100 with SpeedStir,WS
    A proud practitioner of TFP since 2013

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    Re: Liquidator flow issue

    Quote Originally Posted by laprjns View Post
    Mine has been doing that for the past two seasons now and I haven't seen any problems.
    Good to know...thanks!
    18-20k gallon in ground pool w/gunite surface
    Leslie's Crystal Clear II DE filter - DE-LE-42054 - 96gpm
    Hayward Super Pump with AO Smith UST1102 1.0HP motor
    Non-SWG

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    Casselberry, FL
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    Re: Liquidator flow issue

    I've been meaning to follow up on this for some further advice, but just haven't gotten around to it. After removing the inlet side check valve, I began to notice that I'm getting a lot of DE draining back into the pool after the pump shuts off. Is there something I can do to avoid this from happening or do I basically have to just reinstall the check valve and find a different solution for my flow issue?
    18-20k gallon in ground pool w/gunite surface
    Leslie's Crystal Clear II DE filter - DE-LE-42054 - 96gpm
    Hayward Super Pump with AO Smith UST1102 1.0HP motor
    Non-SWG

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    Re: Liquidator flow issue

    Try soaking the check valve in a 50/50 muratic acid/water mixture for an hour. Wash off with water, shake or blow out, and reinstall. If DE is still getting into the pool, you may have a filter grid that has a tear or a totally bad check valve. You could always plug the Liquidator lines temporarily for a test. My DE filter grids typically last 8 to 10 years. and when one goes bad, I get DE in my pool. It is most notable when the pump shuts off and seen at the drain.

    I think the check valves are somewhat poor on the Liquidator. I get some drop in my level too, but no DE in the pool and the tub refills and begins working fine after 15 minutes from the time the pump starts up in the morning.
    John (DIYer). Concrete, approximately 13,000 gallon in-ground pool with adjoining concrete spa. Approximately 40 years old. Hayward Super II pump for pool and legacy Anthony Sta-Rite bronze pump CF6 for spa, VA-26 filter,(2 sets), Rheem propane heater for spa. HASA Liquidator for pool.

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    Casselberry, FL
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    Re: Liquidator flow issue

    Quote Originally Posted by hoosierrun View Post
    Try soaking the check valve in a 50/50 muratic acid/water mixture for an hour. Wash off with water, shake or blow out, and reinstall. If DE is still getting into the pool, you may have a filter grid that has a tear or a totally bad check valve. You could always plug the Liquidator lines temporarily for a test. My DE filter grids typically last 8 to 10 years. and when one goes bad, I get DE in my pool. It is most notable when the pump shuts off and seen at the drain.

    I think the check valves are somewhat poor on the Liquidator. I get some drop in my level too, but no DE in the pool and the tub refills and begins working fine after 15 minutes from the time the pump starts up in the morning.
    Thanks for the tip...out of curiosity, when I try to blow through the check valve, shouldn't the air flow through in the direction of the arrow and resist going the other way? The air doesn't seem to flow in either direction when I blow into it.
    18-20k gallon in ground pool w/gunite surface
    Leslie's Crystal Clear II DE filter - DE-LE-42054 - 96gpm
    Hayward Super Pump with AO Smith UST1102 1.0HP motor
    Non-SWG

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