Irrigation well pump keeps losing prime

Discussion in 'Irrigation / Sprinkler Forum' started by Russell Brown, Jun 7, 2018.

  1. Russell Brown

    Russell Brown New Member

    Joined:
    Jun 7, 2018
    Location:
    Coconut Creek, FL
    Hi, I recently had a new irrigation well dug as the old one collapsed. The well was dug to 60' with 2" PVC. I did the plumbing hookup my self. The well guy said to put the check valve close to the well pipe, so I put it right after the 90 degree elbow. I then ran 2" PVC to where the old 1 1/2" PVC came from the pump. I used a 2" to 1 1/2" coupling. I primed the pump and the well worked great. There is about 60-70 feet from the pump to the well.
    However, after a day, the pump loses it's prime and I have to re-prime it. On the old 1 1/2" plumbing the check valve was close to the pump. I have no idea if there was another valve close to the well as we could not find where the old well was.

    My question is ... should the check valve be closer to the pump? Is that why I keep losing prime? If so, can I just add another one, or should I take the one by the well off?

    Also, I dug up my piping to check for leaks and I can't find any ....

    Any help or suggestions would be great ...

    Thanks in advance!!!
     
  2. WorthFlorida

    WorthFlorida The wife is still training me.

    Joined:
    Oct 28, 2009
    Occupation:
    Retired
    Location:
    Orlando, Florida
    Location of check valve has no impact but close the well is preferred. From pump inlet to the well (water table) there is a leak allowing air to enter OR the check valve is not closing tight enough or some debris is preventing it from closing. For air leaks (pin holes) would usually be at any threaded fittings. The check valve is most likely.

    After you prime the pump and run it turn off the pump. Put your ear to the pipe. If the check valve is not closing you’ll hear and maybe feel the water going back down the well. A second check valve won’t hurt if it makes you feel better.

    The check valve at the well allows you to have the 50 feet of water sitting in the pipe. Occasionally, after months non use, the water from the valve to the well will drain back into the ground. The long pipe with water in it will allow it the self prime the well. As the water gets sucked out of the pipe, the vacuum behind the water will pull the water from the well. Actually atmospheric pressure does it.
     
  3. Sponsor

    Sponsor Paid Advertisement

     
Similar Threads: Irrigation pump
Forum Title Date
Irrigation / Sprinkler Forum Irrigation well pump somethings doesn't pump water when cut in pressure low. Monday at 6:36 AM
Irrigation / Sprinkler Forum Irrigation Pump with Relay Switch Apr 15, 2021
Irrigation / Sprinkler Forum Irrigation pump cycles fast then slow then trips breaker. Jul 28, 2020
Irrigation / Sprinkler Forum Capacitor start submersible pump relay for irrigation May 21, 2020
Irrigation / Sprinkler Forum Please Help Free Flowing Irrigation needings pump Apr 16, 2020

Share This Page