overflow design

Discussion in 'Anything DIY Related' started by butcherman, 5 Feb 2010.

  1. butcherman

    butcherman Moderator MASA Contributor

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    Had my 4ft tank drilled and adriaan put in a 50mm 1 1/2 insh to 50mm blukhead.
    now i was wondering whats the best way to do the plumbing from there to the sump. do i just use elbows and direct the pipes in the most direct route to the sump. Or do i put a t piece straight after the overflow and extend a pipe to above the water level?

    I'd like to iliminate as many bubble as possible by not putting in a bad design and also make the overflow as quiete as posiable.
    these are the only pics i have for now

    [​IMG]

    [​IMG]

    [​IMG]
     
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  3. RiaanP

    RiaanP Moderator

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    Put a elbow outside, facing up, with a pipe going upwards, slightly lower than water level. At top, a T piece, (with T on its side) at the top, put an end cap, with vent valve, to form your durso. Pipe to the side goes to sump.

    What you will find is that the water level in overflow will be as high as the loop outside. No waterfall inside, deep enough to stop most bubbles.

    Well that is what I will do.
     
  4. RiaanP

    RiaanP Moderator

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    and to test it, glue the pipes with silicone. And when you are happy it works, pull it apart and glue forever with PVC weld
     
  5. butcherman

    butcherman Thread Starter Moderator MASA Contributor

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    Thanks Riaan. So what your trying to say is use the overflow inside the tank almost as a bubble trap but raising the water level.
    How will the loop made outside by this affect the over flow?
    Is the function of the "durso" to silence the water noise inside the pipe?
     
  6. RiaanP

    RiaanP Moderator

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    The higher the loop, the higher the water level inside the overflow box.

    Durso end cap should be above water level, 10mm.

    Durso will (should) prevent that running toilet noise.

    If you take the pipes outside directly down, you will have a Niagra waterfall inside your tank, ;lots of bubbles, lots of noise.
     
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