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Thread: Pentair Dynamo pump - Can't get the lid to close

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    Pentair Dynamo pump - Can't get the lid to close

    This may be a dumb question, but this is really driving me crazy so I am hoping you guys can help.

    The last few times I have cleaned out my pump filter basket, I have had a lot of trouble getting the lid back on the container for the filter basket. I am not technical so forgive my lack of knowledge of what things are called. The problem is that the clear lid will not go fully down over the basin where water enters and the filter basket sits. I have cleaned all of the surfaces involved with this (the lip of the basin, the inside of the lid, the rubber part that causes it all to seal...). The only thing I can figure is that either the lid has shrunk, the basin has expanded, or the rubber thing has lost it's flexibility.

    Here are my questions:

    1) does any of this make sense, first off? I can try to explain it better if not.
    2) has anyone ever run into this? What did you do to fix it?
    3) Any other suggestions?
    13,500 gallon AGP. Sand Filter. Swimmax Electric Heater

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    Re: Pentair Dynamo pump - Can't get the lid to close

    Make sure your basket is sitting how it is supposed to as well - this WILL prevent proper seating of your lid (at least - it does on my SuperFlo) .
    16x32 IG 19,000 gallons, Pentair 1.5 hp Energy Efficient Superflo pump (348024),vinyl liner, Chlorine dispenser, Hayward S-244T sand filter

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    Mod Squad Bama Rambler's Avatar
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    Re: Pentair Dynamo pump - Can't get the lid to close

    Are you using plenty of lube of the it?
    Is it the same if you rotate it 180 degrees?
    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: Pentair Dynamo pump - Can't get the lid to close

    Quote Originally Posted by Bama Rambler
    Are you using plenty of lube of the it?
    Is it the same if you rotate it 180 degrees?
    I was wary to use lube on it, so I haven't. I'm guessing that is why it was getting harder and harder to get on. Is there a particular type of lube to use? Is WD-40 OK?
    13,500 gallon AGP. Sand Filter. Swimmax Electric Heater

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    Mod Squad zea3's Avatar
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    Re: Pentair Dynamo pump - Can't get the lid to close

    Use a silicone based lube on the o-ring. Petroleum based lubes will cause the o-ring to deteriorate over time.
    TFP Moderator
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    Vogue 21' round AG, Pentair 1 hp 2 speed pump, 36 sq ft DE filter, Hayward S180T 150# sand filter, Houston, Texas
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    Mod Squad Bama Rambler's Avatar
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    Re: Pentair Dynamo pump - Can't get the lid to close

    Jacks Magic or another brand of pool lube is what you should use.
    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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