Cavitation

Discussion in 'Irrigation / Sprinkler Forum' started by Sherman02, Aug 2, 2011.

  1. Sherman02

    Sherman02 New Member

    Messages:
    2
    Location:
    Michigan
    Okay, To try to move water 30ft up hill for approx 600ft we purchased a Gould gt15 pump. We have a 2 inch pipe inlet and a 2 inch pipe outlet. The outlet pipe then goes the 600 feet in 2 inch poly pipe to refill a pond, but the pump now cavitates. We got the pump to stop cavitating by reducing the end of the pipe (end of the discharge pipe 600 feet away from pump) down to 3/4 spicket and into a 1/2 inch cloths washer hose, but then we only get 10gpm. Is there a better way to stop the cavation while keeping the volume high?

    Thanks
    Greg
  2. valveman

    valveman Moderator Staff Member

    Messages:
    4,586
    Location:
    Lubbock, Texas
    With only 30' up the hill and running to a wide open pipe, that pump is trying to put out 60 GPM. It is hard to suck 60 GPM through a 2" pipe. Your cavitation will greatly reduce if you use 3" suction all the way to the pump.
  3. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    27,255
    Location:
    Cave Creek, Arizona
    Is the pump at the top or bottom of the 30' elevation? Cavitation occurs when the pump "runs out of water".
  4. LLigetfa

    LLigetfa DIYer, not in the trades

    Messages:
    4,185
    Location:
    NW Ontario, Canada
    Along with the elevation of the intake, how long is the run? Also, what is there for filtration on the intake?

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