return pump flooding sump when off

Discussion in 'Beginner Discussions' started by nathen, 1 Apr 2010.

  1. nathen

    nathen

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    Q how to prevent return pump from siphoning water back to sump when return pump is off
     
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  3. neo

    neo

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    Drill a small hole in your return pipe in DT just below the water level, when pump stops water will drain to sump and DT water level will drop, the hole will open and suck air and the siphon will break.
     
  4. jacquesb

    jacquesb Retired Moderator

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    Hi Nathen - make a small hole in the return piping, JUST below the water level.... This will ensure that the water does not siphon back into the sump via the return pump.

    This hole will allow air into the pipe, breaking the vacuum...... thus not sucking the water out anymore....
     
  5. jacquesb

    jacquesb Retired Moderator

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    LOL Neo - we posted together.... and great minds..... or fools? ;) LOL!
     
  6. neo

    neo

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    :lol:my siphon breaker works like a charm, so its rather ....great minds.... i'd say ;)
     
  7. Sentari

    Sentari

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    Make a siphon break where the water level will be. This way it will break the siphon. Check the photo below.

    [​IMG]
     
  8. mariusmeyer

    mariusmeyer

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    HEHE. Repeat of all the above said stuff.
     
  9. nathen

    nathen Thread Starter

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    thanx all
     
  10. Neil H

    Neil H Moderator MASA Contributor

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    Just make sure that your sump can handle the bit of siphoning that will occur ... if it cannot, the problem is more complex !
     
  11. PeterL

    PeterL

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    I had a more elaborate plan I was going to implement tonight on my piping, after seeing this one, simpler is in theis case so much better. I would never have guessed - lol, this is so simple yet effective, brilliant, thanks guys - helped a 2 for the price of 1 :thumbup:
     
  12. Reef Maniac

    Reef Maniac MASA Contributor

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    Just one further bit of advice, REGULARLY check the hole, and make sure that it is not clogged. Coralline algae will start to grow in & around the hole, and WILL clog it within a few months. I suggest you make yourself a "hole unclogger thingie" from a piece of stainless steel rod of the same diameter as the hole, and push it through the hole at least twice per week, just to be on the safe side.

    Also, as Neil suggested, regularly (say every month) switch the return pump off, and make sure that everything is still working as designed.

    Hennie
     
  13. Megalodon

    Megalodon

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    or you could just make sure the return ends just just below the surface of the water...that way it will only suck out less than a cm of water depending on your display to sump size ratio.
     
  14. ravi

    ravi

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    what happens if the return pipe is above the water. will anything happen?
     
  15. Reef Maniac

    Reef Maniac MASA Contributor

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    Well, if it's above the water then it cannot create a siphon. that is the safest, and is how my sump return plumbing is installed.

    Hennie
     
  16. Jacojs

    Jacojs

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    Tagged
     
  17. RiaanP

    RiaanP Moderator

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    Also rather have two little holes.You only need one stupid snail to park of at the wrong spot at the wrong time, resulting in a flooded sump (again).
    [​IMG]
    Here is my version. Using micro irrigation connector. Puched into the flexible hose.
    Make sure it does not block up, stick a toothpick into it sometimes. Easy to check. If you do not see the pee-line, then you got trouble. Also snail less likely to cause trouble. Inside of connector is slanted. So if you turn is halfway, the pee-line is shorter or longer.
    So in the morning, when feeding, just check your pee-line. As easy as that.
     
  18. ravi

    ravi

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    thanks guys. i like the pee hole idea. is this guaranteed not to syphon my display. i need the quietest method cos my tank is loud as the return is above the water level at the moment. thanks
     
  19. RiaanP

    RiaanP Moderator

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    Yes, then your return will be below water level. And you will have less bubbles, and less salt spray onto your lights. :thumbup:
     
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