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Thread: DOS not priming

  1. #1
    Regular Vistor
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    Sep 2016
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    Indianapolis, IN
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    Unhappy DOS not priming

    Hello,

    I am trying to get the DOS device to prime, but nothing is coming out. The wheels turn, but nothing. I have made sure the in tube is in fact in water.

    Also, I tried to take the the pumps off, but cannot.

    Please advise.

    Thank you,

    Don

  2. #2
    Frequent Contributor zombie's Avatar
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    Denver, CO
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    Make sure the compression fitting is on good. If correct, you should not be able to suck or blow on the tube when it's not running.

    Make sure the power supply is plugged in. It will turn on but won't run if that isn't plugged in.

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

  3. #3
    Regular Vistor
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    Thanks that appears to be the problem.

  4. #4
    Frequent Visitor
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    If you can, try to use the Neptune supplied tubing, heating the end in hot water before fitting and tightening the compression nut. Air ingress is a pain, but you might also find ingress from other joints (such as to your dosing containers) so it's worth paying attention here also to reduce annoying bubbles in the lines and inconsistent dosing.

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