How to prime check valve suction side. (no foot valve)

Discussion in 'Pumps and Tanks Well Forum & Blog. Water is life.' started by stormlight, Dec 3, 2018.

  1. stormlight

    stormlight New Member

    Sep 11, 2018

    How does one prime a suction line/pump when using a check valve? Let's say you have a pump, a few feet before the suction line goes in the ground you have a check valve. Then you have 10 feet of the suction pipe that holds nothing but air until you hit water in the ground. How does the pump not die sucking that 10 foot of air when being turnt on the first time?

    I was watching a youtube video and cam across this picture. Is this needed and would it even work?

    Or can you put a ball valve on the output side and close it. When the pump turns on and you see the pressure build you know that the water is coming up the pipe while the pump stays primped and then you you release the ball valve?

  2. valveman

    valveman Cary Austin Staff Member

    Mar 15, 2006
    Pump Controls Technician
    Lubbock, Texas
    Prime the pump as best as you can, then let it run for a minute. If it doesn't pick up, repeat the process. Every time you start the pump the water will come up a little until it finally picks up and pumps as it should. Don't use a plastic or flapper type check valve.
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  4. banjo bud

    banjo bud Member

    Sep 24, 2018
    South Carolina
    That picture looks more like there’s a submersible pump in the well.
  5. Reach4

    Reach4 Well-Known Member

    Sep 25, 2013
    I suspect that picture has a foot valve.

    Without a foot valve, somebody could suck on the pipe with a vacuum cleaner, and then close the valve. That might suck 90 or so inches of water, depending on the vacuum, so whether that would be a useful head start, I don't know.
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