Putting bathroom in attic need serious help

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by middie8, Jan 6, 2005.

  1. middie8

    middie8 New Member

    Messages:
    9
    Putting bathroom in attic need serious help(PICS ARE UP, thx terry)

    Here are the pics. Corner jacuzzi is going in back right corner under window. Pedestal sink is to the left of that. Toilet is in front of the sink, as you can see the 3" PVC going from left to right. And lastly a shower going in opposite the jacuzzi. I have a bathroom on the 2nd floor using the main stack you see to the right and well as a kitchen. My questions are:

    Is wet venting going to be a problem? How bad?

    Where do I vent the toilet?

    Please help, thanks,

    pics to follow, they are too big to post,

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    Last edited: Jan 6, 2005
  2. Deb

    Deb Plumber

    Messages:
    200
    Location:
    Idaho
    Deb

    I can tell you this without pictures. The 3" PVC is most likely vent for lower floors. You CANNOT just connect the attic bathroom drainage into this. You are either going to need to revent everything below or drop a stack down for the attic bathroom. You cannot "wet vent" from floor to floor. Every fixture is going to need to be vented and trapped (correctly).
    I will post back again after the pictures are here.
    Deb
    The Pipewench
  3. middie8

    middie8 New Member

    Messages:
    9
    so i need to connect everything into a 3" pvc drain to go down and connect somewhere in the basement, because it is below the kitchen and 2nd floor bathroom.

    i put the "junior" in junior member
  4. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,293
    Location:
    Cave Creek, Arizona
    pictures?

    Where are the pictures? From your description, however, it appears that you are going to create an entirely new drain system for the attic plumbing and connect it to the existing sewer system somewhere below the existing first floor. You are describing a system where the drain piping can be even more complicated than the venting because of space issues and joist placements.
  5. middie8

    middie8 New Member

    Messages:
    9
    if i understand you right i cannot drain my jacuzzi, toilet, sink and shower into the main stack that runs down my entire house out to the street. this would be a wet vent? if so, then wouldnt that be a problem with my second floor bathroom, it drains into the same pipe?
  6. dwpecksr

    dwpecksr New Member

    Messages:
    24
    Location:
    Kansas
    2nd story bath

    all the waste and drain lines from the second floor need to tie into the waste line below the first floor bath. change the 3x2 san tee (horizontal) and use a 3x2 y instead. I can't tell if you notched the floor joists or not. It would have been better if they were drilled. looks like all you needed was a 2" line from the 3" san vertical tee. That tee could of been a 3x2 san tee. I'm not knocking your work, just saying how i might have done it.
    Can you get a 3/4 hot and cold up to the second floor?
    Test your work before covering up and the use of nail plates is a good idea.
    Dale :) :)
  7. LonnythePlumber

    LonnythePlumber Plumber, Contractor, Attorney

    Messages:
    319
    Location:
    Wichita, Kansas
    Hi Jim

    Thank you for coming over to this site so you can gain a broader input on your project. It doesn't stop your project but it does mean some more planning and more work. But you will get a system that works. You would feel worse to finish everything and then have problems with not just your new bathroom but your lower floors as well :eek: . There is a lot more to get a drainage and vent system to work that it may first appear :eek: .
    The second floor works now because it has a vent. If you change it's vent into a drain then you don't have the same system. When the plumbers see your pictures and how far you have gone then .....have a thick skin :cool: . Keep asking questions and you can lick this. But you need to start accepting that you're going to need another pipe going through the second floor. What's under this room?
    Don't get mad and don't give up. This is just a bump. Big bump but still a bump.
  8. middie8

    middie8 New Member

    Messages:
    9
    under this room is my 2nd floor bathroom, then under that is my kitchen. those holes are drilled dale, thanks for the suggestions, I need to look and see if I can run a 3" pvc down the stack right next to the other one.

    thanks again and keep em coming,

    jim
  9. Deb

    Deb Plumber

    Messages:
    200
    Location:
    Idaho
    Deb

    You have got some real problems here. You need a seperate drop for the attic drainage or a new vent for the lower fixtures. You cannot use the vent from a lower floor for the discharge of drainage from an upper floor.
    It is a little hard to tell exactly what is going on, but it appears that none of the fixtures are vented except the lav. You cannot use sanitary tees in the horizontal. Trying to describe how to vent this may be difficult. This goes for the jacuzzi, shower, and toilet. You will need to take a horizontal vent off the main line because of space restrictions. You cannot run drainage from another fixture into the trap arm of another fixture. The vent take off has to be within 5' of its trap on 2" line and 6' for the toilet (regardless of whether you use 3" or 4"--UPC code), from the top of the flange to the point of vent. You must use a combination fitting or a wye and an 1/8th bend, the invert must be rolled so that the takeoff is above the center line of the drainage pipe the vent serves, and graded. You must use drainage fittings anytime you have a vent take-off below the flood rim level of the fixture. The tub and shower will need traps. A toilet has an integral trap.
    You need 1/4" per foot grade.
    Deb
    The Pipewench
  10. LonnythePlumber

    LonnythePlumber Plumber, Contractor, Attorney

    Messages:
    319
    Location:
    Wichita, Kansas
    Twenty Four Hours

    Jim, it's been 24 hours and we haven't heard from you. You're not pouting are you :rolleyes: ?
  11. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,293
    Location:
    Cave Creek, Arizona
    jim

    Probably busy cutting the pipes apart and redoing them.
  12. middie8

    middie8 New Member

    Messages:
    9
    no, no pouting at all, just staring at the back wall and the pvc and shaking my head laughing

    all in all im glad i did go on this page, thank you lonny
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