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Thread: Is this water closet drain vented properly?

  1. #1
    DIY Junior Member mjsmith0's Avatar
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    Default Is this water closet drain vented properly?

    Here are a couple pictures of the plumbing for my water closet. (One is dry fit and the other shows it installed). Does this look like it's vented this properly? (The vent pipe will extend 4-5' farther up before it turns.)

    Thanks in advance!
    Last edited by mjsmith0; 02-14-2010 at 09:59 PM.

  2. #2
    Test, Don't Guess! cacher_chick's Avatar
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    A vent cannot run horizontally until it is a minimum of 6" above the flood rim of the highest fixture.

  3. #3
    Plumber jimbo's Avatar
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    Unfortunately that is a VERY BIG NO. That fails inspeciton for the very real reason that such a horizontal vent would very soon be clogged with waste.

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    DIY Junior Member mjsmith0's Avatar
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    Darn, I was afraid of that. Thanks for saving me from a big mistake. I got the idea of venting it this way from the a DIY webpage:

    http://www.diyadvice.com/diy/plumbin...in-vent-lines/
    I guess it's wrong?

    Mary
    Last edited by mjsmith0; 02-14-2010 at 09:52 AM.

  5. #5
    DIY Junior Member jc60618's Avatar
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    The last illustration would pass inspection in Chicago, I dont know about your area.The pictures you posted before wouldnt because you had those two fiitings raising the quarter bend above the vent. But like I said this last illustration would pass in Chicago. We often vent suspended toilets, p-traps or showers this way.

  6. #6
    DIY Junior Member mjsmith0's Avatar
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    Gotcha. It makes sense to me now. Probably should have realized that before. Thanks!

  7. #7
    Master Plumber-Gas Fitter shacko's Avatar
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    Quote Originally Posted by mjsmith0 View Post
    Darn, I was afraid of that. Thanks for saving me from a big mistake. I got the idea of venting it this way from the a DIY webpage:

    http://www.diyadvice.com/diy/plumbin...in-vent-lines/
    I guess it's wrong?

    Mary
    Under the UPC you can run a flat vent the way it's shown, you just have to add a clean-out on the vent where it comes up in the wall.

  8. #8
    DIY Junior Member mjsmith0's Avatar
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    Default Another idea

    How about this? Would this work and pass inspection? (The sanitary tee is rotated 45 degrees around the horizontal.)
    Last edited by mjsmith0; 02-14-2010 at 10:05 PM.

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    Nope, 2 reasons. can't lay a san tee on its side and your vent off the back of it is still flat. Re-think the whole thing. What code are you under? If it's IPC your vent to water closet distance is unlimited and it may be far better to wet vent the whole lav throught the lav.

  10. #10
    DIY Junior Member mjsmith0's Avatar
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    Default One last try

    Here is a variation on that design that would fit in the space I have. It is somewhat like the design I found on DIY site I showed above, but with a twist (literally!) I wonder if its too much of a pretzel?

    Thanks everyone for your patience and help while I try to figure this out!
    Last edited by mjsmith0; 02-14-2010 at 04:49 PM.

  11. #11
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    Nope, you still have a flat vent there. All vent piping must rise vertically.

  12. #12
    Plumber krow's Avatar
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    Its being wet vented from what I see. The only issue that I see is that you have too many bends before the vent

  13. #13
    DIY Junior Member mjsmith0's Avatar
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    Quote Originally Posted by Peter Griffin View Post
    Nope, 2 reasons. can't lay a san tee on its side and your vent off the back of it is still flat. Re-think the whole thing. What code are you under? If it's IPC your vent to water closet distance is unlimited and it may be far better to wet vent the whole lav throught the lav.
    If the water closet distance is unlimited, can I do something like this. (This is a picture that show more or less how the whole system is designed.)
    Last edited by mjsmith0; 02-14-2010 at 11:31 PM.

  14. #14
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    Krow, that looks like a clean out there, not a san tee.

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