low pressure,need help

Discussion in 'Irrigation / Sprinkler Forum' started by howardken, Jul 9, 2008.

  1. howardken

    howardken New Member

    Messages:
    3
    have 60 lbs of pressure,working 6 heads,can i install 1/2hp motor in line with only 45psi,will this boost my pressue any?
  2. valveman

    valveman Moderator Staff Member

    Messages:
    4,418
    Location:
    Lubbock, Texas
    A ½ HP jet pump can add about 40 PSI to 12 GPM flow. So yes it could help. Are you boosting city water?
  3. howardken

    howardken New Member

    Messages:
    3
    yes i'm using city water.you say @60psi a1/2hp pump will boost my pressure up more on a 3/4 inch line.
  4. valveman

    valveman Moderator Staff Member

    Messages:
    4,418
    Location:
    Lubbock, Texas
    As long as you are not using more than 12 GPM, the 1/2 HP pump will add 40 PSI to the city pressure. If the city pressure is 20, you will be getting 60 PSI.
  5. howardken

    howardken New Member

    Messages:
    3
    thank you.i have 60lbs now ,will it bring me up to 70psi?
  6. Wet_Boots

    Wet_Boots Sprinkler Guy

    Messages:
    798
    Location:
    Metro NYC
    You'd be better off trying to rework the sprinklers, like trying smaller nozzles in them, which can make them spray further. A better match as a booster would be a 1/3 horsepower jet pump, but they can be hard to find.
  7. valveman

    valveman Moderator Staff Member

    Messages:
    4,418
    Location:
    Lubbock, Texas
    A 1/2 HP will add 40 PSI to whatever is coming in. 60 coming in, 100 going out, unless you regulate it with something, like a Cycle Stop Valve.
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