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GPMs of water with elevation changes.

  1. Oct 17, 2011 #1
    If I have a 2" water meter restrickting flow out of a fire hydrant and want to pump water 1 mile away with an elevation rise of 500' will my GPM's at the outlet increase if I use a 4" hose coming out of the 2" meter or should I stay with 2" hose?
  2. jcsd
  3. Oct 17, 2011 #2
    NOTE: Only operate a fire hydrant if you are authorized to do so!

    The flow rate will increase some if you run 4 inch pipe. It depends on the magnitude of the restriction of your 2" flow meter compared to 500 feet of 4 inch pipe.

    Your 500 ft rise is worth about 217 psi whcih may be far larger than the meter or pipe. Is the pressure from the hydrant boosted?

    Do you have pressure drop or Cv data for your flow meter?
    Last edited: Oct 17, 2011
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