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Thread: Confirmation of plumbing layout needed

  1. #1
    DIY Junior Member mahuska's Avatar
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    Default Confirmation of plumbing layout needed

    Hello All
    I have just redone the layout for the third time and i think this one might work. I am using a old laundry shoot to take new pipes to the basement. This is a story and a half and the load bearing wall below is in line under the bathtub and shower space and it carries the toilet and sink waist pipe to the basement (not shown). The shower is a curbless design using Kerdi Line so the joists are cut down and sistered. What do you think?
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    Last edited by mahuska; 08-21-2013 at 10:27 PM.

  2. #2
    In the Trades Tom Sawyer's Avatar
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    Tub vent is flat, no go. Must rise vertical until 6" above flood level rim of the highest fixture served by the branch which is the lav.
    [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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    quote; Must rise vertical until 6" above flood level rim of the highest fixture

    That is only half of the requirement. The full requirement is 6" above the flood level of the highest fixture OR 42" above the floor WHICHEVER IS HIGHEST.
    Licensed residential and commercial plumber

  4. #4
    In the Trades Tom Sawyer's Avatar
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    Ipc only says 6" above highest fixture served.

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    DIY Junior Member mahuska's Avatar
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    So this can't be a wet vent? Also if this is problem with the tub would it also so be a problem with the shower which is the same design, different shape. Also Iowa adopted UPC 2009
    Last edited by mahuska; 08-22-2013 at 07:24 AM. Reason: added infomation

  6. #6
    Moderator & Master Plumber hj's Avatar
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    Well, since the IPC is an "anything goes code", that would explain it. A toilet would only require that it be about 21" above the floor. The good codes assume that a kitchen sink COULD be added at some later date which would require the 42" height, therefore they require it from the beginning.
    Licensed residential and commercial plumber

  7. #7
    DIY Junior Member mahuska's Avatar
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    This is a remodel and the second floor walls are not over the downstairs walls. I did not move the walls and the tub is now where a shower was that had no vent at all. The wall with the vents is 2 feet out over the living room. Even if i could go straight down through the load bearing wall directly under the tub the vent has to to go to a wall so this is why i use something like a wet vent concept. I do not see many options here so any ah-ha moments would be greatly appreciated.

  8. #8
    Moderator & Master Plumber hj's Avatar
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    Ah-ha moments occur when we are there and can actually see the entire situation. Why are you using a right hand tub? Is there going to be a wall there that you are not showing?
    Licensed residential and commercial plumber

  9. #9
    DIY Junior Member mahuska's Avatar
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    Its a corner tub next to a shower. No other walls are going to be built.

    Name:  shower tub DWV layout 6.jpg
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    Last edited by mahuska; 08-22-2013 at 03:11 PM. Reason: added drawing (sp)

  10. #10
    DIY Junior Member mahuska's Avatar
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    What if I dumped the 1.5 tub drain into the 2 in with a wye and 60 deg bend so the entry into the 2 was at a 45 down and the 2 inch continued to the wall as is to vent. Would this work or would that just make an "s" trap?

  11. #11
    DIY Junior Member mahuska's Avatar
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    It seems like it this system as i have drawn was looked at as a wet vent system then it could work (UPC 908.1) or i could tuck an island sink type vent under the rim of the tub (UPC 909.0)

  12. #12
    In the Trades Tom Sawyer's Avatar
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    It is in no way a wet vent system. There needs to be a fixture upstream for it to be wet vent. What you have is a flat vent which won't fly
    [B]No, plumbing ain't rocket science. Unlike rocket science, plumbing requires a license[B]

  13. #13
    DIY Junior Member mahuska's Avatar
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    So if i delete the vent section going to the tub and use a long sweep or better a combo wye to connect the tub this becomes a branch and put a clean-out on the end of the wye using a 45 or 60 bend to angle it up to the tub service access that would work?

  14. #14
    Moderator & Master Plumber hj's Avatar
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    If I interpret what you said properly, then you would create a 3/4 "S" trap, which is just as bad as a full "S" trap.
    Licensed residential and commercial plumber

  15. #15
    DIY Junior Member mahuska's Avatar
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    I might have a solution that that will work avoiding the issues brought up. I with make the changes and post later.

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