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Thread: Airgap!

  1. #1
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    Default Airgap!

    This is the very first time I have seen an airgap installation on a filter system. This was a Culligan reverse osmosis installation and it had an airgap and a p-trap. I was astounded. Normally, I see a saddle connection that discharges through a hole drilled into the sink drain pipe. It is the white cylindrical doohickey next to the disposal. The discharge tubing enters the top, the front of the airgap/cylinder is open. Sorry about the quality of the pic. Somewhat overexposed.

    I got so excited, that I just had to share.

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  2. #2
    Ted Menelly's Avatar
    Ted Menelly Guest

    Default Re: Airgap!

    I guess it is designed so the water does not back up into the overflow line and contaminate the water. Hmm. Makes sennse to me.


  3. #3
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    Default Re: Airgap!

    Neat ... but ... what happens when the drain backs up and ... starts to back up into the disposer ... ?













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  4. #4
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    Default Re: Airgap!

    Quote Originally Posted by Jerry Peck View Post
    Neat ... but ... what happens when the drain backs up and ... starts to back up into the disposer ... ? Why do I always have to be the one to ruin a good party?
    You really are killjoy. With proper maintenance, the sink should <never?> back up. But, have you ever seen anything like this? I suppose the R/O drain could go into a dishwasher airgap, but then you would end up with two of those little chrome R2D2 things on your sink.

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  5. #5
    Peter Taheny's Avatar
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    Default Re: Airgap!

    Gunnar

    Just one.

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  6. #6
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    Default Re: Airgap!

    Quote Originally Posted by Gunnar Alquist View Post
    But, have you ever seen anything like this?

    Only once, and I had the same question then.

    My client looked at it, looked at the hole, looked at the sink so far above it, then said '(non-repeated word)! That thing backs up and I've got a cabinet full of crappy water!', or words to that effect. I said 'Yep. That's what I'm talking about.'


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  7. #7
    Peter Taheny's Avatar
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    Default Re: Airgap!

    Gunnar

    It also appears that there are two traps on that trap arm.

    CPC 2007 1001.1 Not more than one (1) trap shall be permitted on a trap arm.

    CPC 2001 1001.1 Not more than one (1) trap shall be permitted on a trap arm.

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  8. #8
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    Default Re: Airgap!

    Ooh, I hadn't caught that. Thanks.

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  9. #9
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    Default Re: Airgap!

    Most of the RO systems that are newer have a built in air gap for the drain. It runs uphill to the dispenser, and then back down to the drain.

    Jim Robinson
    New Mexico, USA

  10. #10
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    Default Re: Airgap!

    Quote Originally Posted by Jim Robinson View Post
    Most of the RO systems that are newer have a built in air gap for the drain. It runs uphill to the dispenser, and then back down to the drain.
    I haven't seen that. Do you have a pic?

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