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  • Results 1 to 8 of 8

    Thread: Gravity fed diy sieve filter possible?

    1. #1
      nlkoi is offline Junior Member
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      Gravity fed diy sieve filter possible?

      Edit: added new image with gravel on the bottom. This is a blocked off chamber at the end of my 15x15 pond. Bottom drains come in on the right side, drain onto an angled sieve, muck slides down into catch drain, water falls through sieve into a large aerated K1 media pit, once water reaches certain level a switch kicks the pumps on, pumps move water faster than the bottom drains feed, water level lowers and pumps kick off. The bottom drains are always running unless I can time the pumps perfectly with the bottom drain flow, otherwise they'd have to kick on and off with a float valve.

      Please see the attached image. I'm planning a concrete block chamber filtration system and would love to integrate a diy cetus style sieve system in the first chamber. I'm sure it's possible but all I can't figure out how. In my head I see the water equalizing across the chambers and flooding the sieve making it useless. Is it possible to have a gravity fed system where the chambers don't equalize and such a system is possible.Name:  KoiSeiveChamber.jpg
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      Last edited by nlkoi; 11-29-2021 at 05:18 PM. Reason: improved

    2. #2
      Paul Sabucchi's Avatar
      Paul Sabucchi is online now Senior Member
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      Where are you going to put the pumps? Somewhere between the sieve and the second chamber I presume?

    3. #3
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      Lookup reverse criel sieves. Several have successfully used them on gravity systems.
      The real Batman wears polyester! Don't be fooled by the plastic imposter.

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      Pumps in final chamber

    5. #5
      nlkoi is offline Junior Member
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      Name:  KoiSeiveChamber.jpg
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    6. #6
      nlkoi is offline Junior Member
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      Thoughts on this design. This is a blocked off chamber at the end of my 15x15 pond. Bottom drains come in on the right side, drain onto an angled sieve, muck slides down into catch drain, water falls through sieve into a large aerated K1 media pit, once water reaches certain level a switch kicks the pumps on, pumps move water faster than the bottom drains feed, water level lowers and pumps kick off. The bottom drains are always running unless I can time the pumps perfectly with the bottom drain flow, otherwise they'd have to kick on and off with a float valve.

    7. #7
      Orlando is online now Senior Member
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      On your second and third chamber's you will have to drop the height of your overflows with the current set up your sieve chamber would be constantly flooded.

    8. #8
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      Too difficult to regulate and the possibility of the pump constantly kicking on-off. Reducing pump life.

      Got to ask why this design? This has been tried many times and failure is why sieves with floating weirs exist to automatically regulate flow. Just design a floating weir for this chamber.

      The reverse criel sieves are the only ones that work on a total gravity system. They are also less effective than the floating weir sieves.
      Last edited by batman; 11-29-2021 at 10:19 PM.
      The real Batman wears polyester! Don't be fooled by the plastic imposter.

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