low pressure drum into high pressure pump??

Discussion in 'Grow Room Design & Setup' started by goldenDurt, Apr 11, 2012.

  1.  
    goldenDurt

    goldenDurt Member

    I'm having a problem with my 40 gallon drum not exerting enough pressure to deliver water into a pump.

    The bulk head fitting is 3/4" and it connect to a 3/4" hose.
    Does anyone else have this problem?
    :wall:
  2.  
    phillipchristian

    phillipchristian New Member

    Where is the fitting located on the drum. I have a 55 gallon one with a 1.25" fitting located at the bottom and it supplies plenty of water to a 1hp centrifugal pump. Seems weird.
  3.  
    goldenDurt

    goldenDurt Member

    It's located on the bottom side of the drum. It's attached to a faucet and it leaks out of the faucet with no pressure. I figured these drums should leak water out at at least 40 psi. I figure I'll just rip the faucet out and directly attach the hose to the drum
  4.  
    Atomizer

    Atomizer Well-Known Member

    You`d need a 90ft column of water above the faucet to get 40psi. When the drum is full (highest pressure) you might get 1.5psi
  5.  
    phillipchristian

    phillipchristian New Member

    How do you figure? Do you have any proof or science to back this up? I have a 55 gallon drum with a 1.25" fitting at the bottom. My drum only has 35 gallons in it. That fitting feeds a 1.5hp cast iron pump.
  6.  
    Atomizer

    Atomizer Well-Known Member

    The science is called..gravity :) A 3ft depth of water in the drum wont generate 40psi of pressure at the faucet. If you really need to prove it, attach a hose to the faucet and see if it can fire a jet of water a good 30-40ft in the air.
    Alternatively, put a pressure guage on the line feeding the pump (pump turned off, drum full to the brim) and see if it reads 40psi or less than 1.44psi.
  7.  
    phillipchristian

    phillipchristian New Member

    Maybe you are right. Sounds like it but I really don't know the science behind how much psi water generates. But in referencing the OP's original question I think you are way off subject. A 55 gallon drum filled with water creates enough pressure to feed a pump. I've set up a bunch of water cooled rooms and almost all of them are designed this way. If you go on hydro innovations website they sell reservoirs specifically designed for this. And these aren't little hydro pumps I am using. Full blown cast iron 1.5hp centrifuge pumps.

    Check this YouTube video out. This guy is running a 1hp pump I think and a 55 gallon reservoir hooked up to it. (http://www.youtube.com/watch?v=i5McHIyOQM8). This is what they OP is discussing.
  8.  
    Atomizer

    Atomizer Well-Known Member

    If you read the OP`s other post you`ll see he`s trying to feed a high pressure misting pump that requires a significant inlet pressure to generate >450psi output.
    27" of water column/head = 1psi
    phillipchristian likes this.
  9.  
    phillipchristian

    phillipchristian New Member

    Well then...sounds like you got it figured out! :lol:


    I just figured he was trying to feed a pump. Thanks for the clarification and knowledge. +rep for being cool & smart. LOL.

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