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Thread: Rough in

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  1. #1
    DIY Junior Member afrye707's Avatar
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    Default Rough in

    I am doing the rough in plumbing in my barn for a bathroom (vanity, toilet, shower) my questions are how close should I bring my 4" main waste line to my first 3" wye or does it not matter? Can I have a elongated 90 in my main 3" line, I need to go 4" to a 4" 45 then my 3" needs a 3" 90 all in slab or should I avoid 90's until in put my pipes up my wall? I am currently working on a layout in my head that I will poast later.

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    Moderator & Master Plumber hj's Avatar
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    It doesn't matter, and you use the "correct" fittings you need to do the job.
    Licensed residential and commercial plumber

  3. #3
    DIY Junior Member afrye707's Avatar
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    What would be a correct fittings? when drawing my layout I feel like I should have as little to no 90's and 45's in any of my 3" pipe or 4" main waste line if possible.

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    In the Trades Tom Sawyer's Avatar
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    You have whatever you need to make the system work.
    [B]No, plumbing ain't rocket science. Unlike rocket science, plumbing requires a license[B]

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    Moderator & Master Plumber hj's Avatar
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    If you want to fix a faucet, this is where to come. If you want to do an entire DWV system, that is a different matter. I have NEVER seen a DIYer install a proper system by just asking for a description. In fact some of the worst abortions I have seen have been when they worked from a correct drawing, but decided to interpret it the easy way.
    Licensed residential and commercial plumber

  6. #6
    DIY Junior Member afrye707's Avatar
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    I am not a DIYer. I run a HVAC company that specializes in radiant flooring or hydronic heat. I just wanted to ask those two questions here in my drawing I don't think a DIYer would be able to draw this. I have two options send the pipe through my footing with no joints or extend my pipe down making me install a swiping 90 and a 45 but drilling through only a couple inches of cement. All I am asking is what would you do? Name:  Pipe diag.jpg
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  7. #7
    DIY Junior Member afrye707's Avatar
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    This drawing is for the downstairs upstairs I will have a 2nd bathroom with the same set-up plus a kitchen with dishwasher and sink, and a stub out for a wash machine. Would it be ok to wet vent everything but the shower? Or just wet vent it all like you said?

  8. #8
    In the Trades Tom Sawyer's Avatar
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    that depends on your trap to vent distances. You can only wet vent a bath group though (no washers or kitchen sinks etc) and you can only wet vent on one branch interval
    [B]No, plumbing ain't rocket science. Unlike rocket science, plumbing requires a license[B]

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