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  1. #1
    Junior Member Rank = Fry Folbo's Avatar
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    Skimmer pipework advice please

    Hi.

    I am designing a new system and I am wondering why many designs seem to have independent systems for the skimmer and the bottom drain.

    I am think about something like this ...
    Skimmer into main.jpg
    The skimmer joins the main 4" bottom drain, before going into a sieve ... filter ... UV and back to the pond.
    From a point of rest (pump off), this should be stable? Once the pump is on, the it should draw from the skimmer and the bottom drain ... to give the flow. I am considering a valve near the skimmer that I can use to adjust the balance between the two sources, or even isolate the skimmer completely.

    What am I missing?

    Thanks.

    Skimmer into main.pdfSkimmer into main.pdf



  2. #2
    Senior Member Rank = Jussai g mac's Avatar
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    I suspect that you wouldn't get an even pull on both.

  3. #3
    Senior Member Rank = Hassai Mike Bass's Avatar
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    Quote Originally Posted by Folbo View Post
    Hi.

    I am designing a new system and I am wondering why many designs seem to have independent systems for the skimmer and the bottom drain.

    I am think about something like this ...
    Skimmer into main.jpg
    The skimmer joins the main 4" bottom drain, before going into a sieve ... filter ... UV and back to the pond.
    From a point of rest (pump off), this should be stable? Once the pump is on, the it should draw from the skimmer and the bottom drain ... to give the flow. I am considering a valve near the skimmer that I can use to adjust the balance between the two sources, or even isolate the skimmer completely.

    What am I missing?

    Thanks.

    Skimmer into main.pdfSkimmer into main.pdf
    The problem is that you need to balance the suction just right as one will always overpower the other.
    I had this design originally On my 1000gallon pond but luckily had a gate valve on each So was able to balance the flow until I separated them to separate sieve on the skimmer & drum on the drain

  4. #4
    Extreme Koi Member Rank = Nisai harryc's Avatar
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    Not a great idea as you will reduce the flow on the bottom drain.

  5. #5
    Senior Member Rank = Kyusai Sim's Avatar
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    Sounds good but in practice doesn’t work very well, you are also reducing the turn over to what you can get through one 4”pipe.
    if you decide to alter anything later you will be more Ltd.
    i have two bottom drain and skimmer going into a drum and now think it may be better to take the skimmer off.
    Get more draw from the bottom drains and the skimmer.

 

 

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