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Thread: Connecting 2 water tanks to 1 pump

  1. #1

    Default Connecting 2 water tanks to 1 pump


    I have 2 water tanks on the roof of my house. One of them was recently added because we were running out of water in the early evening. Major road construction nearby and some water supply lines to our neighborhood have cut, so our municipality has been rationing water to our area (I'm in the Middle-east).

    I have connected the 2 tanks with a tee, but I'm finding that it may be a little more complicated than that. It seems that when the main tank is empty, the pump stops working. I guess its drawing air and automatically shuts off, even when the other tank has plenty left.

    My pump details here.

    Is there a 'proper' way to connect 2 water tanks to this pump?


  2. #2
    That's all folks! Gary Slusser's Avatar
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    Aug 2004
    Wherever I park the motorhome.


    Show us or at least describe the plumbing of the tanks.
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  3. #3


    Thanks, heres a rough sketch:

  4. #4
    Journeyman & Gas Fitter Doherty Plumbing's Avatar
    Join Date
    Jun 2009
    Penticton, BC


    Quote Originally Posted by blued View Post
    Thanks, heres a rough sketch:

    The piping from each tank should be equal in length to the pump.

    IE the pump should be moved towards the left so that the connections coming out of the tee are the same length going to the 90s and up into the tank.

    This will cause the pump to draw off each tank evenly!

    Like this

    Last edited by Doherty Plumbing; 11-21-2009 at 10:07 PM.

  5. #5


    OK, got you. Will have to move the pump and redo the piping then. Thanks.

  6. #6
    DIY Junior Member breid1903's Avatar
    Join Date
    Jul 2009
    fulton, indiana


    just center piping. breid..........


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