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Thread: Stuck Union & Low Suction

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    Join Date
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    Stuck Union & Low Suction

    I just discovered this forum. I did a search, but did not find an answer to my question and hope you can give me some ideas. It all started when I installed an ez-vac (Kreepy Krawley for Above Ground Pool) and discovered I do not have enough suction. I spoke to my pool guy and he said he thought the 1 HP motor on my Waterway pump was more than sufficient. He suggested I reach in through the pump basket and make sure none of the impellers were clogged or broken. My hand is not long enough. There is a split nut union in between the pump basket and the pump. I tried to remove it to gain access to the impellers, but it is stuck. It will not turn even with a strap wrench. I removed the two stainless steel screws that seem to hold the two parts of the union together and the two sides do not separate. Since all of this is plastic and I have never worked with "unions" I have been reluctant to get too forceful. Here are my questions?

    1. Do you agree that the 1HP motor on a Waterway pump should provide enough vacuum to run a vacuum side cleaner?

    2. Could the impellers be clogged or broken and the pump still function enough to run water through the filter, but not enough to run the cleaner?

    3. What is the best way to check the impellers?

    4. How do I remove the stuck union?

    I will sure appreciate any and all suggestions and insights.
    Larry in Texas

    Above ground 7,700 gallons, 19 inch sand filter ( 2 sq. ft.), Liquidator, and a WaterWay Hi-Flo Pump with an A.O. Smith 1 hp SF 1.0 motor.

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    Re: Stuck Union & Low Suction

    1- yes it should be enough, perhaps throttling the skimmer valves to increase suction at the cleaner would help.

    2-yes , its possible.

    3- The best way is to open the pump up and inspect the impeller and pump housing. The easiest way is just like he described.

    4- Try tapping lightly on the piping at the union , wd-40 might help as well. Make sure the pump or strainer has some room to move apart ( not bolted down and has some flex in the piping )
    coloeb,
    20k gal. IG fiberglass/plaster rectangle 32'x16'
    Hayward Superpump 3/4 H.P. primary Hayward model 5060 Booster Pump
    Hayward Pro Series High Rate Sand Filter
    Pentair Model 320 automatic Chlorine/bromine in-line feeder

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    Re: Stuck Union & Low Suction

    Thanks coloeb. I got if off. Sprayed with a little PB and then a light tap on a screwdriver and it broke loose. Thanks. I found a broken ring of plastic inside. Not sure if this is part of the pump or trash that somehow got in there. The plastic ring is white plastic. There is an intact white plastic conical shaped ring inside the pump. When I look at Waterway pump diagrams I see the conical piece, but I do not see any other ring or gasket (other than the union gasket which I have). Do you think this broken ring is just trash or is it a part that needs to be replaced?
    Larry in Texas

    Above ground 7,700 gallons, 19 inch sand filter ( 2 sq. ft.), Liquidator, and a WaterWay Hi-Flo Pump with an A.O. Smith 1 hp SF 1.0 motor.

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    Mod Squad JohnT's Avatar
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    Re: Stuck Union & Low Suction

    Can you post a picture?
    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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    Re: Stuck Union & Low Suction

    Here are some pictures. The more I look at it in better light I think the broken ring may be the remains of part of the pump. Perhaps the wear sleeve?

    [attachment=2:npoleuxa]Plastic ring in pump.jpg[/attachment:npoleuxa]

    [attachment=1:npoleuxa]Inside Pool Pump 1 web.jpg[/attachment:npoleuxa]

    [attachment=0:npoleuxa]Inside Pool Pump 2 web.jpg[/attachment:npoleuxa]

    What do you think. Is the plastic ring trash or the wear sleeve, or another part?
    Attached Images Attached Images
    Larry in Texas

    Above ground 7,700 gallons, 19 inch sand filter ( 2 sq. ft.), Liquidator, and a WaterWay Hi-Flo Pump with an A.O. Smith 1 hp SF 1.0 motor.

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    Re: Stuck Union & Low Suction

    As a final follow up this is what I found. The WaterWay pump is the hi -flo model and it has a wear sleeve that goes inside. The white plastic was all that was left and so I replaced it. Everything seems to be find now and the suction is much greater. I am amazed that just a little bit of plastic would cut the suction that much.
    Larry in Texas

    Above ground 7,700 gallons, 19 inch sand filter ( 2 sq. ft.), Liquidator, and a WaterWay Hi-Flo Pump with an A.O. Smith 1 hp SF 1.0 motor.

  7. Back To Top    #7
    Melt In The Sun's Avatar
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    Re: Stuck Union & Low Suction

    Glad you figured it out!
    11,200 gal, Pebble-Tec; Tristar 2-speed 1hp - Swimclear 325 ft2 cart - SWG - A & A in-floor cleaner - Heat pump. For the poolside cooking, a Yoder Wichita and a Big Steel Keg!
    TF Test Kits -- PoolMath -- Pool School
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