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Thread: cetus seive install?

  1. #1
    Sansai
    Join Date
    Aug 2007
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    bay area ,ca
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    cetus seive install?

    I plan replace my S/C by Cetus seive and my pump will stay high then output pipe about 6in. What happen when you shut off you pump? water still come in until it lever with pond lever or it shut off by some valve inside Seive? and my pump need one way valve for it? Thank you

  2. #2
    MCA
    MCA is offline
    Honmei MCA's Avatar
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    Dec 2003
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    The cetus like most seives has a float inside. The float drives a weir or other device that controlls the flow rate. When the pump is no longer removing water, the float will rise on and close the intake. So in theory a well designed and propely installed seive will not flood when the water pump is off.

  3. #3
    Nisai
    Join Date
    Oct 2004
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    53
    The weir will stop the water level rising too high in the sieve from the inlet side, i.e. the water coming from the pond, however you should fit a non return valve between the outlet of the sieve and the pump otherwise if you turn the pump off water could back flow into the sieve and flood it.

  4. #4
    Sansai
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    ????

    My question is a cetus seive will remain empty or water will rise up to pond water lever? Which mean i can keep my old set up ( pump high than out let) or i have to go down ?

  5. #5
    Nisai
    Join Date
    Oct 2004
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    I'm a little confused by how you intend to set this up sorry.

    You can either install it gravity or pump fed.

    If you are gravity fed then the sieve will need to be level with the pond and the wier will stop it filling too much. The float in the base causes the weir to rise if water is not being pumped out from the base stopping any further water entering. In normal operation the water level will be maybe 6 inches in the base of the sieve. However as I mentioned above water can syphon back through the pump if it is turned off which could cause the sieve to fill.

    Alternatively you can pump feed the sieve in which case it is higher than the water level and cannot flood as if you stop the pump all the water will continue to flow out via gravity until the sieve is empty.

    Does that help ?

  6. #6
    Sansai
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    Thank you.

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