Durso Noise

Discussion in 'Beginner Discussions' started by Alias, 17 May 2011.

  1. Alias

    Alias

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    Hey,

    New tank is in and im quite happy with it. It came with a durso as its in the TV room and needs to be really quite. At the moment its really noisy, think jacuzzi.

    most of the noise comes from the sump where there seems to be a lot of big air bubble flowing out the bottom, almost like it builds up pressure and then releases. I have drilled the hole on the end cap bigger but didnt seem to help too much.

    Any ideas how to stop this? its really loud.
     
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  3. Irma

    Irma

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    I had the same problem until the guys fitted a ball valve on the down pipe. Now it's much quieter and no air bubbles!!
     
  4. dallasg

    dallasg Moderator MASA Contributor

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    is the return pipe submerged?
     
  5. Broder

    Broder Mudshark

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    The hole size on top should be adjustable. By making it bigger you're allowing more air to enter the downpipe. Tweak the hole size until you get the correct mixture.
     
  6. Tony

    Tony

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    +1
     
  7. Qaiser

    Qaiser

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    I had the same problem. all i did was added some more 90 degree bends to break the fall and made the overflow about 20mm from the sump base. when it had less bends its sounded like a toilet
     
  8. Neil H

    Neil H Moderator MASA Contributor

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    or drill a hole in the down pipe just above the water level

    its the back pressure that builds up and causes the noise, i drilled an 8mm hole in mine and it worked like a bomb !
     
  9. Duri

    Duri

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    yes its from your overflow... adjust the hole or put sponge or floss etc there
     
  10. Alias

    Alias Thread Starter

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    @dallasg the return pipe is submerged. Will try get pics up after work.

    @Neil H is the hole just above the water level in the sump or the overflow?

    @Qaiser, i added a 90 degree bend the other night and it didnt really make a difference. Im going to put a air valve on top of the endcap, maybe that will help.
     
    Last edited by a moderator: 26 Nov 2015
  11. Alias

    Alias Thread Starter

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    This might help explain. i drilled n 8mm hole on the return down pipe. I tried fitting some clear pipe in the end cap and it doesn't let enough air in.

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]
     
  12. Alias

    Alias Thread Starter

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    @RiaanP, maybe you have an idea?
     
    Last edited by a moderator: 26 Nov 2015
  13. RiaanP

    RiaanP Moderator

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    Why is the Durso so deep under water?

    what size hole did you drill there?

    I got a 6mm hole, with a flexible piece airline tubing fitted. And airvalve to contol the amount of air entering. But I do have noise as well. Exactly same setup below the tank. With those two elbows. What happens is that the water do fall a significant distance before it hits the first elbow. And that is where my noise comes from. I still need to replace both the 90 degrees with 45 degree bends.

    But my Durso on top, is a soil vent valve. A lot simpler.
    [​IMG]
    Inside it got 4 rubber valves, just remove them
    [​IMG]

    My water level is just below half of the top part.
     
  14. Alias

    Alias Thread Starter

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    @RiaanP, Not sure why the water level sits so high, will try get it a little lower tomorrow, any tips on how to get it to the right level?

    At the moment i have 6mm hole ut it makes a whistling sound, I tried to put some airline in but it doesnt let enough air through so creates a syphon and then the flushing effect. Should i change the elbows to 45's? and maybe add a gate valve at the bottom?
     
    Last edited by a moderator: 26 Nov 2015
  15. SumthingFishy

    SumthingFishy

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    Hi Alias

    Try replace the 90 degree bend with a 45, it will be alot more quiet. Other thing you may try is to take an empty milk bottle or a plastic container and place the end of the pipe (in the sump) in this bottle/container. This will trap the bubble noise and the spray. Will also add support to the overflow pipe as the water exits with some force.
    And a ball valve will help to regulate the flow.
     
  16. Broder

    Broder Mudshark

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    Dude. . . It's really simple. You just need to adjust the amount of air going into the durso standpipe. Get a new end cap. Drill an 8mm hole through the SIDE. The hole must go through the cap AND the pipe underneath. If you turn the cap, you reduce the size of the hole and therefore less air gets in and VIOLA. . . .the water level in the over-flow drops.
     
  17. Xereo

    Xereo

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    @Alias .. Best Way to get the noise next to nothing,
    Run air tube through the hole you just drilled down your pipe.

    And all your problems will be solved :)
     
    Last edited by a moderator: 26 Nov 2015
  18. Alias

    Alias Thread Starter

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    Thanks all, after i voted i spent the day modifying stuff. put an air line in the end cap and a gate valve on the downpipe.. now its nice and quite, just a load of micro bubbles now.

    Thanks all for the help..
     
  19. RiaanP

    RiaanP Moderator

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    Microbubbles, put a slanted T piece at the bottom, underwater. With slanted T facing upwards. On that part put 45 degree elbow, facing up. And short PVC pipe extending upwards above water level. At the bottom opening of the T-piece you can add another short piece of PVC, all the way to the sump bottom. Then the bubbles will try to go up, into the T-piece. and it will keep the salt spray inside the pipe, instead of all over the sump.
    [​IMG]
    Mine, The blue pipes. Ignore the white pipes on the right with the yellow basket. That is my return from the refugium.
     
    Sentari likes this.
  20. Sentari

    Sentari

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    Very cool idea Riaan!
     
  21. DanieDJ

    DanieDJ

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    Good idea

    Would you post some pics riaan ?
     
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