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Thread: PMUP: push connector causing intermittent failure

  1. #1
    Frequent Visitor mebeknob's Avatar
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    PMUP: push connector causing intermittent failure

    Hooked up the ATK according to directions. All is well. ATO worked and water was flowing. I looked at the ATO container and water was going all over inside the container. Figured the fittings weren't pushed together properly. So I pulled the pmup out and pushed the fittings all the way in. But when its like that no water gets pumped out? The pump is on but no flow. Tried to reset the fittings multiple times to no avail. It's either water coming out of fittings or no flow.

    Any ideas?


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  2. #2
    Frequent Contributor zombie's Avatar
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    Could just be a bad apple that either got damaged during shipping or somehow got past Neptune QA (more likely the former, neptune QA is pretty good). I would contact support or swap it out with a new one if you bought it locally in the last 30 days.

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

  3. #3
    Master Control Freak RussM's Avatar
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    Be more specific please. What fitting are you talking about? Where exactly is water coming out?
    Please do not send me PMs with technical questions or requesting assistance - use the forums for Apex help. PM me ONLY if the matter is of a private or personal nature. Thanks.

  4. #4
    Frequent Visitor mebeknob's Avatar
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    Quote Originally Posted by RussM View Post
    Be more specific please. What fitting are you talking about? Where exactly is water coming out?
    The 3/8" to 1/4" push fit adapter that comes with the kit. If the tube or pump is not fully pushed into the adapter, water squirts out of the end that isn't fully seated. But the pump will work in this case.
    But is the adapter is fully seated the pump will not get water to flow.

    My first thought was the line was getting pinched or restricted when fully seated. But I proved that not the case.

    The problem is the issue is intermittent. I got the pump to work a few times with the connections fully seated.


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  5. #5
    Frequent Visitor mebeknob's Avatar
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    Here are 2 videos of each situation.
    A) Pump flows but fitting is loose and shoots water everywhere
    B) Fitting is tight but no flow.

    https://youtu.be/P3ZAwOdfNRA
    https://www.youtube.com/watch?v=E3vC2dhNeNk

  6. #6
    Frequent Contributor zombie's Avatar
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    In that first video it looks a little bit like the mechanical float might be stopping the flow. If you set it like the first video and press the float down, does it let water flow?

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

  7. #7
    Master Control Freak RussM's Avatar
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    It looks to me like the float valve is at an angle - make sure it is vertical.

    Inspect the 1/4" side of the 3/8-1/4" adapter - make sure the round clip part is not broken and that the o-ring is present and appears to be in the proper position.
    Please do not send me PMs with technical questions or requesting assistance - use the forums for Apex help. PM me ONLY if the matter is of a private or personal nature. Thanks.

  8. #8
    Frequent Visitor mebeknob's Avatar
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    I thought the same, I even removed the tubing from the 90 degree adapter. Issue persisted

  9. #9
    Master Control Freak RussM's Avatar
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    I meant the push-fit on the PMUP, not the elbow.
    Please do not send me PMs with technical questions or requesting assistance - use the forums for Apex help. PM me ONLY if the matter is of a private or personal nature. Thanks.

  10. #10
    Frequent Visitor mebeknob's Avatar
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    I've since removed the float valve to ensure it is not causing issues.
    O-rings appear to be in the correct positions. With the pump and tubing connected to the fitting, I am able to easily blow air through the tubing and out the pump. This way I know there is not a physical blockage in the system.

  11. #11
    Frequent Visitor mebeknob's Avatar
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    Quote Originally Posted by RussM View Post
    I meant the push-fit on the PMUP, not the elbow.
    I was referring to the 3/8" to 1/4" adapter. The previous comment was a response to another post about the 90-degree adapter. I removed the tubing for the 90-degree adapter and the same issues persisted with the tubing clear enough to easily blow air though.
    So to summarize the no-flow condition, the issue has persisted with:
    1) tubing removed from 90-degree adapter
    2) alternate 1/4" tubing
    3) pump placed in different water container (deeper water)

    The pump will flow in the following conditions:
    1) Fitting fully seated with no 1/4" tubing attached
    2) Fitting not fully seated and 1/4" tubing attached
    3) Intermittently worked with shorter piece of 1/4" tubing, but no consistent results

  12. #12
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    Same issue as shown in Video B

    Quote Originally Posted by mebeknob View Post
    Here are 2 videos of each situation.
    A) Pump flows but fitting is loose and shoots water everywhere
    B) Fitting is tight but no flow.

    https://youtu.be/P3ZAwOdfNRA
    https://www.youtube.com/watch?v=E3vC2dhNeNk
    I'm experiencing the same issue as in your second video. Pump doesn't pump but makes noise. Broken pump I assume? Have you solved it?

    I've only had it for a short period. Was working great and then suddenly would just make a lot of noise and not pump at all.

    TIA

  13. #13
    Frequent Visitor mebeknob's Avatar
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    Quote Originally Posted by Generic View Post
    I'm experiencing the same issue as in your second video. Pump doesn't pump but makes noise. Broken pump I assume? Have you solved it?

    I've only had it for a short period. Was working great and then suddenly would just make a lot of noise and not pump at all.

    TIA
    They sent me a new connector and it works now (I think)


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