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Thread: PMUP Not working

  1. #1
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    PMUP Not working

    I have a PMUP in my sump that I am hoping to use for water changes. It is connected to 1/4" tubing that runs about 12-13 feet up my wall then goes across my attic (parallel run) then down 12 feet or so to the bathroom drain. The PMUP just hums for a long time and doesn't move water. I have two PMUP's and was hoping the first was defective. However, both are doing the same thing.

    I am sure I am missing something. Any suggestions?

  2. #2
    Frequent Contributor zombie's Avatar
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    You're probably overdoing the head on the pump. It's only rated for 14' which means anything above 10' unless it's a straight shot with little to no horizontal will either stop it completely or bring it to a slow drip.

    You might be an engineer if...You have no life and can prove it mathematically.

  3. #3
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    Thanks Zombie! There was a kink in the hose. Couldn’t see it as it was in the wall. Once I pulled the tubing out a bit, it cleared right up. Works perfectly.

  4. #4
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    My PMUP has died after only a few days usage. Is this typical?

    The body of the pump is very warm, almost hot. If I put a stick in I can spin the propeller and get it started. Then it stops again. Have to call for a new one. Kind of disappointed.

    Also, this is for an ATO of RO/DI water so there is nothing that could have impacted in the impeller like lime water or anything.
    Last edited by JCase; 12-22-2017 at 18:41. Reason: more info

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