Silence overflow and return pump

Discussion in 'Biological/Natural Filtration and Deep Sand Beds' started by Pugsly, 19 Oct 2009.

  1. Pugsly

    Pugsly

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    Hi all,

    A question - how can one silence a "drop out" overflow system, and how does one prevent bubbles going into the 1st chamber from the drop out piping?

    I have a drop out box located in the back right corner of my tank and the tank is drilled at the bottom. Water flowing over the top makes a huge noise and above all else it creates allot of air going into the sump which causes allot of bubbles popping in the sump and splashing onto the sides and over the sump. This is a huge waste of water to me. Also increases the salt creep in the area!

    How can I "soften" the noise of the overflow and how can I get rid of the bubbles going down with it?

    My piping is run down into the sump and just below the water level in the sump.

    Thanks in advance
     
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  3. clinton stanford

    clinton stanford

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    hey pugs:) with regards to the bubbles in the sump..i had the same problem.i extended the pipe further down in the sump and then put a stocking over the pipe with a stone in to keep it down.you can use a elastic band to hold the stocking on the pipe and its nice and easy to take off to clean.works like a charm....try make your stocking as long as possible-let it hang just above the bottom of the sump.
    cheers;)
     
  4. RiaanP

    RiaanP Moderator

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    Increase the length of the standpipe in the overflow chamber.

    And fit either (Google it, plenty of pictures)
    • Durso
    • Stockman
    • Hofer Gurgle Buster
    Or easiest, simplest method, buy a soil vent valve from Builders Warehouse. Drill a 6mm hole and put an airline tube with valve.
     
  5. Pugsly

    Pugsly Thread Starter

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    my tank is a jebo tank - prebuilt - I can not add the above to it.
    Was thinking of maybe filling the overflow box with big bio balls to lessen the space inside it so that it can "fill" up a little more - would that not work?
     
  6. Pugsly

    Pugsly Thread Starter

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    how would you install the soil vent valve then?
    and what about the bio balls in the drop out box to "fill" it a bit
     
  7. leslie hempel

    leslie hempel Moderator MASA Contributor

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    can you post a pic so that we can see if something else cant be suggested?
     
  8. Pugsly

    Pugsly Thread Starter

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    this one is a bit old but looks something like this.
    [​IMG]

    On the left is where the water is entering including a huge amount of air bubble etc.
     
  9. leslie hempel

    leslie hempel Moderator MASA Contributor

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    when i was at northlands i saw they actually cable tied a plastic bag with a slit cut into it to the pipe.. it really worked in stopping the spashing as the bubbles rose and popped in the bag.. perhaps something like that would work..
     
  10. Pugsly

    Pugsly Thread Starter

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    should I maybe just plumb a "U" into the whole thing, would that not stop it?
     
  11. durleo

    durleo

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    I use the Northlands trick - its working well - And on my external skimmer i use a stocking to keep any bubbles from forming:)
     
  12. brentv

    brentv

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    Bud, I,ve got the same hassle as you noise factor and all!
    I think your idea of putting a bend on will work,
    gonna try tomorrow and let you know
     
  13. RiaanP

    RiaanP Moderator

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    What diameter is the down pipe? Here is a 50mm, I think you do get a 40mm. It have 4 rubber valves inside, just take them out. The concept is exactly the same as a Stockman. Only DIY is the drilling of the 6mm hole. And a lot more compact than a Durso

    [​IMG]
    and without the cap

    [​IMG]
     
  14. Soyuz Apollo

    Soyuz Apollo

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    Hi there...just a quastion Riaan.I can't figured out what it's the air pipe for.It's to suck the air out when the stand pipe is overflowed...?...
     
  15. RiaanP

    RiaanP Moderator

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    Air does need to go in. else it will gurgle it in from below. Can control the air until it is silent. Durso and Stockman designs got the same.
     
  16. Soyuz Apollo

    Soyuz Apollo

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    Thanx Riaan...i think i got it...so i presume the air valve is to control the air quantity intake...
     
  17. RiaanP

    RiaanP Moderator

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    Yes Soyuz Apollo.
    Just adjust until silent
     
  18. Pugsly

    Pugsly Thread Starter

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    can I also add the bio balls to the drop out box - cause my air is being pulled in at this point and gets pushed with the water into the sump. The water flow over the top of the drop out box and falls 600mm to the bottom where the tank is drilled.

    Another thing - Riaan - how would I install the soil vent because all my plumbing is in the cabinet inder the tank. Is there a certain height that this soil vent must be?
     
  19. RiaanP

    RiaanP Moderator

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    You got two options,
    either fill the chamber with more bio-balls and see if it helps.

    or
    remove all the balls, extent the overflow height when soil valve is installed. Problem with this is that detritus might and will settle in the bottom. So you should not glue this pipe in so that you can pull it out and flush the overflow chamber.

    or you can put a piece of plastic netting so that the water runs down the plastic to the bio-balls level and also disperce on a piece of rolled of plastic netting. That should diffuse the sound a lot. I did this before. Netting should be above 10mm so that it does not block up
     
  20. Pugsly

    Pugsly Thread Starter

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    I got one of those rubber "u" type fittings you find under ones sink or basin - can it be used? Was told that it will remove the bubbles from entering the sump.
     
  21. brentv

    brentv

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    I bought 2 90degree bends today, made sure the pipe flowing to the sump was slightly higher than the water level, put the 90 followed by the other so it was aiming up and now the water kinda slowly cascades over and in... prob solved!
     
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