VFD to CSV sprinkler question

Discussion in 'Pumps and Tanks Well Forum & Blog' started by jpennin217, May 18, 2012.

  1. jpennin217

    jpennin217 New Member

    Messages:
    3
    I changed over to a CSV system after the electronic control in my VFD went out over the winter. The CSV is placed where the main line enters the house and I have great water pressure in the house a constant 50 psi or so. My issue is that my sprinklers are ran right out of the well and my pressure is about 30 psi at the most and I cannot run my sprinklers. How do I increase the pressure for my sprinklers? Thank you
  2. cacher_chick

    cacher_chick Test, Don't Guess!

    Messages:
    3,248
    Location:
    Land of Cheese
    The bronze/brass CSV can go in the well. The plastic one probably can too depending on the weight that will be hanging off from it.
  3. valveman

    valveman Moderator Staff Member

    Messages:
    4,472
    Location:
    Lubbock, Texas
    If the sprinklers are tied in before the CSV, it sounds like the pump is not doing as much as it should.
  4. LLigetfa

    LLigetfa DIYer, not in the trades

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    Location:
    NW Ontario, Canada
    The CSV should be placed before the sprinklers.

    When he gets 50 PSI in the house but only 30 PSI at the sprinklers, my guess is the pump isn't running and the water is back-feeding from the pressure tank. While the pump is running, he should see more pressure. If in fact he only sees 30 PSI with the pump running and the sprinklers on, then almost certainly the pump is not keeping pace with demand and moving the CSV would not help.
  5. hj

    hj Moderator & Master Plumber Staff Member

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    Location:
    Cave Creek, Arizona
    To produce ANY pressure above 30 psi, the pump would have to output MORE than that. If the sprinklers are draining the excess pressure above 30 psi, then they are using more water than the pump can produce, and he is at the point on the pump's curve where the volume and pressure are balanced with the demand.
  6. jpennin217

    jpennin217 New Member

    Messages:
    3
    Thanks for the relies. I'm a pretty good handyman but it sounds like I need to get the well guy out to take a look. No way I can put a csv in the well with my equipment.
  7. jpennin217

    jpennin217 New Member

    Messages:
    3
    I replaced my high pressure sprinklers with low pressure sprinklers. I guess I can take a few off the line and see what happens. But the most on one line is 6 the rest are 5.
    Last edited: May 19, 2012
  8. valveman

    valveman Moderator Staff Member

    Messages:
    4,472
    Location:
    Lubbock, Texas
    If you have different sprinklers now, we don’t know the change in flow. If they are tied in before the CSV, you will have low pressure (and only 1 GPM) to the sprinklers until the tank drains and the pump is started. But then you have water directly from the pump, and if the pressure is low, you have on too many sprinklers.
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