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Thread: Liquidator installed below pool level

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    Liquidator installed below pool level

    I have a Liquidator and it works well for me except for one thing. My in ground pool is in Wisconsin and the pump/filter/plumbing is all located in the basement. I installed my Liquidator in the basement also. My problem is that the hydrostatic head of the return line forces water into the inlet of the Liquidator to the point of slowly overflowing the Liquidator when the pump is not running. When the pump is running, the liquidator works fine and the liquid level in the tank stays wher it should. When the pump is off, the tank eventually fills and I get bleach water trickling down the outer sides of the tank.

    Any experiences or suggestions??
    Pool Spa Combo: 16K gallon oval inground pool / 700 gallon spa
    Pump: Pentair VS / Filter: Sand/ Heater: Pentair MasterTemp 300K BTU
    SWG: Pentair Intellichlor 40 / Controls: Pentair EasyTouch
    Other info: Equipment located in the basement

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    JasonLion's Avatar
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    Re: Liquidator installed below pool level

    There is supposed to be a float valve on the inlet that is supposed to prevent that from happening. Sometimes the float valves get stuck open because of calcium deposits and you need to soak them in a diluted acid solution to clean them.
    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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    krcossin's Avatar
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    Re: Liquidator installed below pool level

    I would suggest you treat this as we AGP owners do. You need to have 2 check valves installed to prevent this.
    2007 - 24' AG Doughboy Desert Spring dished 1.5', with DB Power Pak II-1hp pump, DB Sequel I Plus DE, Hayward H-Series Heater 100k + 8gal LQ.

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    Re: Liquidator installed below pool level

    So the Liquidator inlet float valve should be preventing the unit from overfilling. I will look at this closer.

    I would like to better understand the AGP installation with 2 check vlaves.
    I do have 2 check valves installed, one on the outlet and one on the inlet. The inlet check valve lets water into the Liquidator and doesn't help the over fill issue.
    Pool Spa Combo: 16K gallon oval inground pool / 700 gallon spa
    Pump: Pentair VS / Filter: Sand/ Heater: Pentair MasterTemp 300K BTU
    SWG: Pentair Intellichlor 40 / Controls: Pentair EasyTouch
    Other info: Equipment located in the basement

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    JasonLion's Avatar
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    Re: Liquidator installed below pool level

    There are two ways the Liquidator can overflow. The outlet check valve can fail, allowing water to come in the outlet. Or the inlet float valve can fail, allowing water to come in the inlet even if the tank is full.
    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: Liquidator installed below pool level

    Yep just happened to me. I seem to have 2 bad check valves though. At first I tried to swap the inlet and outlet check valves and it overflowed again. I tried cleaning them and that helped a little but it still overflowed. So I ordered replacement check valves and have to close the flow control valve anytime the pump is off. I just hope the new check valves last longer than the 1 month these lasted. I did the 3/8 conversion so these were US Plastics check valves and not the original ones.
    28 foot doughboy AGP, dug out to 5 foot, about 18,000 gallons
    1 1/2 HP pump and 100 lb sand filter
    South Central Pennsylvania

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    Guest

    Re: Liquidator installed below pool level

    The original check valves that come with the liquidator are garbage. Update your check valves with 3/8 push type fittings.

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    Re: Liquidator installed below pool level

    These were the 3/8 valves from US Plastics. I assume that is what you meant? If there is another place to get them, I would be interested to know. Thanks.
    28 foot doughboy AGP, dug out to 5 foot, about 18,000 gallons
    1 1/2 HP pump and 100 lb sand filter
    South Central Pennsylvania

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    Re: Liquidator installed below pool level

    I have the same problem. My equipment is not in the basement, but it is an aboveground pool, with the LQ at ground level. I suspected bad float or check valve, but I have all brand new parts from US Plastics for the 3/8 upgrade, and new float valves from HASA. Is there anyone here with an ABG or smilar situation withOUT this overflow problem? If so, in how is your LQ setup?

    My current setup:

    RETURN PIPE (between filter and return jet)>>control valve>>flowmeter>>check valve>>LQIN>LQOUT>>control valve>>check valve>>SUCTION PIPE
    (between skimmer and pump)
    33' above ground pool, 52" deep, about 27500 g
    sand filter w/zeobrite

  10. Back To Top    #10

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    Re: Liquidator installed below pool level

    After some testing, I am pretty sure it is coming in through the IN float valve, though very slowly. This is a brand new float valve. It seems the water pressure against it is overcoming the upward pressure on the float. Any thoughts?
    33' above ground pool, 52" deep, about 27500 g
    sand filter w/zeobrite

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    Mod Squad Bama Rambler's Avatar
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    Re: Liquidator installed below pool level

    The higher the water level gets the harder the seal presses against the nozzle so I'd take it apart and see if there is a nick in the nozzle nose or if there's a defect in the seal. That float valve should be able to seal against 40 PSI or more.

    Mine overflowed once due to the "out" check valve sticking. I replaced it and haven't had a problem since.

    Here's a pic of my setup.
    As you can see, there's nothing on the "in" side but the tubing.
    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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    Guest

    Re: Liquidator installed below pool level

    Bama-I need your address so that I can come and cut the "tails" off of your zip ties

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    Mod Squad Bama Rambler's Avatar
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    Re: Liquidator installed below pool level

    And I knew somebody was going to say something about that!

    Just head southeast and go till you smell oil and your here!

    Bring your cutters with you cause obviously I don't have any!
    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

  14. Back To Top    #14

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    Re: Liquidator installed below pool level

    Thanks for the pics Bama. I just finished hooking up mine exactly like yours, except I cut off the tails. We don't need any more left coasters prowling around the deep south....don't encourage him.

    We will see if this solves my overflow problem. I have been experimenting with different setups but it never starts overflowing until I stop watching it. If this doesn't work, I;ll reattach the tails.
    33' above ground pool, 52" deep, about 27500 g
    sand filter w/zeobrite

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    Mod Squad Bama Rambler's Avatar
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    Re: Liquidator installed below pool level

    I'd be glad to get rid of all those tails if Bruce would send me their "upgrade kit". No tails on it then.

    I have seriously considered ordering that one. All I'd need would be a couple of male threaded adaptors beyond what they sell to completely change it over.
    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 installed below pool level

    Quote Originally Posted by Miranda
    We don't need any more left coasters prowling around the deep south....don't encourage him.
    We wouldn't know how to survive back there, what with tornadoes, humidity, bugs, etc. Here we get a little earth rattles every now and then, but that's about it. I was only offering to help "Bama out and clean up the equipment area a little bit, and then I'd get in the truck and head back home!

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    Re: Liquidator installed below pool level

    Quote Originally Posted by Bama Rambler
    I'd be glad to get rid of all those tails if Bruce would send me their "upgrade kit". No tails on it then.

    I have seriously considered ordering that one. All I'd need would be a couple of male threaded adaptors beyond what they sell to completely change it over.
    I would love to send you the kit. Will that be cash or check

  18. Back To Top    #18
    Mod Squad Bama Rambler's Avatar
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    Re: Liquidator installed below pool level

    THe check's in the mail!
    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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    poolgirl22's Avatar
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    Re: Liquidator installed below pool level

    Nice pic Bama...I can't wait to get mine next week. That's the honey-do project for the July 4 weekend, unless the arrival is timed with my plumbing guy's arrival.

    (pssst...Bruce...I'm going to be down Bama's way next month...maybe I can take care of those zip tie tails... )
    Backyard pool-less, but used to be.....
    16,100 gallon, 18x38 3.5 ft deep oval AG, Vinyl, Sand, 1hp pump
    http://www.poolservicestech.com Liquidator
    http://www.poolcalculator.com/
    http://www.tftestkits.net TFT100 test kit

  20. Back To Top    #20

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    Re: Liquidator installed below pool level

    Weekend honeydo? shoot, the LQ can be installed in just a few minutes. If you want to avoid drilling holes in pipes and are replumbing anyway, add a couple tees instead. Lowes sells reducing tees with 1/2" threaded on the third leg. They also sell a 1/2" MPT x 3/8" nylon barb to attach the tubing. If you can't find the reducing tee, use a regular tee with a bushing down to 1/2" threaded. The plumbing section should have the barbs near the tubing, but you can also use the black elbows in the sprinkler section. For winterizing, all you need is a couple 1/2" threaded plugs.
    33' above ground pool, 52" deep, about 27500 g
    sand filter w/zeobrite

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