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Thread: Help with rough plumbing...

  1. #1
    DIY Junior Member jeffreypca's Avatar
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    Default Help with rough plumbing...

    Do I need a seperate vent for the toilet or can I use the sink and shower vents if drains are connected to toilet pipe with in 3 feet from toilet??

  2. #2
    Plumber jimbo's Avatar
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    One vent to roof for a bathroom group would not be at all unusual. We would need to see a pic or a diagram to comment on whether everything is actually hooked up right.

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    Moderator & Master Plumber hj's Avatar
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    Default vent

    Your question is so vague that the answer has to be YES, NO, or MAYBE. HOW it is done will determine the answer, not how close it is to the toilet.

  4. #4
    DIY Junior Member jeffreypca's Avatar
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    Will the 2 vents from the sink and shower work for the toilet too?
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    Last edited by jeffreypca; 04-30-2008 at 10:46 AM.

  5. #5
    Retired Defense Industry Engineer jadnashua's Avatar
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    The location is irrelevant, each fixture needs it's own connection to the vent, and it must be vented out the roof. Now, if you can connect to an existing vent, you may not need a separate, independent one. That connection needs to be done at least 42" above the highest drain connecting to that vent line (well, it's 6" above the flood line, but 42" is a good general height - typical kitchen sink height 36" + 6").
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

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    DIY Junior Member jeffreypca's Avatar
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    so, length of the vent pipe doesn't matter? I might be able to connect into the stack, then no need to make another hole in roof.
    Last edited by jeffreypca; 04-30-2008 at 10:50 AM.

  7. #7

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    Do you have at least 1 full sized (In your case 3") vent stack going out anyplace?

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    Retired Defense Industry Engineer jadnashua's Avatar
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    There is a limit on how long the vertical verses horizontal parts of the vent can be, and the horizontal runs should still have slope to them so condensation, rain, etc., can flow back down and not end up plugging the vent. But yes, all of the vents from the individual fixtures can be combined if done properly so you only need one vent exiting the roof. The size of the aggragate vent would depend on the number of fixture units.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  9. #9
    DIY Junior Member jeffreypca's Avatar
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    So, can I used the main 4" stack for the vent?

    How big of vent for 3 1 1/2" vents?? Sink, Shower & Washer
    Last edited by jeffreypca; 04-30-2008 at 08:13 PM.

  10. #10
    DIY Junior Member jeffreypca's Avatar
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    Default updated drawing

    is this a better explanation...
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    Last edited by jeffreypca; 04-30-2008 at 10:15 PM.

  11. #11
    DIY Junior Member jeffreypca's Avatar
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    thank you everybody for your opinons

  12. #12
    Aspiring Old Fart, EE, computer & networking geek Mikey's Avatar
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    It's not clear where the 4" stack is. I guess the question is -- is that wet venting as shown, and can the toilet be wet vented like that? My initial reaction is no for a couple of reasons, but a pro can probably find a way to make it work... isn't there a closet bend fitting that would allow a vent behind the toilet? Also, that 1 1/2" drain for the washer looks a little skimpy.
    Last edited by Mikey; 05-05-2008 at 02:36 PM.

  13. #13
    Plumber krow's Avatar
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    I indicated in a green enclosure the changes that I made to your drawing to make it right
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    Plumber krow's Avatar
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    Here is a basic elevation view of what your plan view may look like
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  15. #15
    Master Plumber Redwood's Avatar
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    Many places the washer line would have to be 2" and cannot have anything else on it.

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