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  1. #1
    Moderator Krugar's Avatar
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    Bouncy Drain line

    Heya,

    I popped home over lunch, 'cuz the new tank has me somewhat paranoid lol.

    Anyway, I've noticed the ABS drain line vibrates quite a bit after the last 45* elbow before entering my sump.

    It's not really bouncing, more or less shaking a bit.

    Is this normal? Do I need to do something?

    Thanks!
    There is nothing so permanent as a temporary measure.

  2. #2
    Moderator mike536's Avatar
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    I wraped the piece of pipe in marine foam as it goes into the sump. I then rested it against the edge of the sump. Presto Bouncing pipe fixed!!!! Hope this helps.
    Cheers,
    Mike Philpott

  3. #3
    Moderator Krugar's Avatar
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    It might, I'll have to look again at how much space I have left...

    What's marine foam & where do you get it?

    Cheers!
    There is nothing so permanent as a temporary measure.

  4. #4
    Moderator cres's Avatar
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    It is likely due to the fact that the amount of water in the pipe at any given point is not consistant.

    You should either tie the pipe to the stand frame or pad it as Mike suggested. The constant vibration will eventually lead to failure of one of your joints and you don't want that stress on the bulkhead into the tank either.
    Sarchasm: The gulf between the author of sarcastic wit and the person who doesn't get it.

  5. #5
    Moderator mike536's Avatar
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    Marine Foam is also called Closed cell foam. You can buy it in any textiles shop. It's a little pricey thou. It resists meldew and al kinds of good stuff. They use it in Life Jackets. It comes in High, Medium and Low dencity.(Spelling) Hope this helps.
    Cheers,
    Mike Philpott

  6. #6
    Moderator Krugar's Avatar
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    I braced the pipe so it doesn't visually vibrate from the bulk-head to the first 45* elbow.

    After that there isn't a whole lot for me to tie it to / brace it on. I'll have to check once I'm home again, but joint failure is more or less what I was worried about.

    Would it be better to cut the ABS after the elbow & put in spa flex or would I still have the same problem?

    Cheers!
    There is nothing so permanent as a temporary measure.

  7. #7
    Moderator Krugar's Avatar
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    Why wouldn't the amount of water in the pipe be constant? There seems to be a constant flow throught the sump and the mag 12 doesn't seem to be 'pulsing'...

    This drain is way giving me a head-ache lol.

    Cheers!
    There is nothing so permanent as a temporary measure.

  8. #8
    Moderator cres's Avatar
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    SpaFlex will absorb more bounce than ridgid ABS (not that there is non-rigid ABS . From the bulkhead down to the sump, the water likely surges faster / slower. Remember the gurgling noise ? A drain in perfect steady state doesn't gurgle.

    Is it a problem that it isn't perfectly stable? No.
    Sarchasm: The gulf between the author of sarcastic wit and the person who doesn't get it.

  9. #9
    Moderator Krugar's Avatar
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    Okay so I'll look for something to brace the rest of the pipe on.

    Thanks.
    There is nothing so permanent as a temporary measure.

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