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  1. #1
    Senior Member
    Join Date
    Jan 2004
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    373

    Plumbing question, reducing plumbing for a pump

    I'm adding a new pump to my tank. It has an outlet of 1-1/2". I'm going to be reducing that to 1" and have a couple outlets. My question is: should I reduce it at the pump outlet, or should I reduce it at the very top where my outlets will be? Will having a bigger opening, for a longer distance give me more pressure, or will it make no difference?

  2. #2
    Senior Member badmedicine's Avatar
    Join Date
    Dec 2004
    Posts
    356
    With swimming pools and ponds the greater the distance and the more turns the greater the peripheral resistance and therefore more load on the pump. I don't know if this applies with tanks as the pump is so close to the tank to start.

    My 2 cents says stay big for as long as you can!
    I have a lot of Patients

  3. #3
    Senior Member
    Join Date
    Nov 2003
    Posts
    6,316
    Make the reduction in size right at the outlet of the entire line .. not at the pump.
    Rob

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