Hand pump for cistern

Discussion in 'Pumps and Tanks Well Forum & Blog' started by rcramp, Oct 13, 2008.

  1. rcramp

    rcramp New Member

    Messages:
    1
    Location:
    Washington
    Hello,
    I have a cistern that is buried and I want to hand pump water from 5 feet below ground level to 25 feet above for a tank that I want to use for irrigation/flushing.
    I realize that this would be too far for a 'shallow well' hand pump if the pump was at the highest level but is it different because the pump is lifting 5 feet and pushing up 25 feet? (25 feet horizontal as well)
    What is the best hand pump for this application. I want 5 gal/min and want it to be hand/mechanical. Is this possible?


    thank you
  2. maintenanceguy

    maintenanceguy In the Trades

    Messages:
    107
    Location:
    Pennsylvania
    A hand pump can push as far as your arm is strong enough. It just can't pull more than about 25-27 feet. This is because atmospheric pressure is just about the same as the pressure at the bottom of a column of water 30' tall.

    Once you have a column of water that's almost 30' tall, atmospheric pressure can't lift the water any higher.

    As for 5GPM, with a head pressure of 30', (that's 5' pulling and 25' pushing), A 1/4hp pump would work. A person supposedly can produce around 100 Watts continuously, a HP is 746 Watts so if you're in good shape, you could probably pump 2 to 2.5 GPM.

    An Olympian might pump 5GPM for the first minute.
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