Drain for basement bathroom

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Ze'ev Garber, May 16, 2012.

  1. Ze'ev Garber

    Ze'ev Garber New Member

    Messages:
    5
    Location:
    Massachusetts
    I'm remodeling my basement bathroom. There was toilet only installed in laundry room in enclosed cabin. I have cleaned the room and removed appliances, toilet, cabin.
    I'm splitting the room into 2 rooms - one for full bath and one for laundry with the wall separating both and 2 separate doors.
    I'll be using caroma rear outlet toilet and plug all drains (bath tub, sink, washer and toilet into one 4" pvc that will connect horizontally with old cast iron stuck.

    The problem is that I only have 3-4 feet between the back of the bathroom wall and existing stuck that I want to connect to. So pipe does 90 degrees and then has four 2 inches pvc pipes connected to it.
    Would it be an issue to contruct the pipe as on the picture? I'm just designing at the moment and have not connected anything yet.

    Thanks for your advise.

    Jeff.

    Attached Files:

  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,139
    Location:
    New England
    The line you are planning on connecting to is a drain...once a drain, it cannot become a vent. None of your new fixtures are vented. You got away with it when there was only a toilet there, but you can't add a sink and shower or tub in there without running a vent line properly. You have to run the vent line high enough in the house until that drain line becomes a vent, then you can tap into it rather than making a new penetration out the roof (unless that's easier).

    Note that dry fitting everything like that will ultimately end up causing you to recut lots of pipe or have to relocate everything since dry, the pipe won't fully seat in the tapered socket of the fittings - you'll lose maybe 1/4" or so at each socket - maybe more.

    Also, can't tell the elevation, but the pipe needs at least 1/4" per foot slope all the way - it doesn't look like there's enough, but the picture can be misleading.
  3. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,825
    Location:
    Cave Creek, Arizona
    What you show so far is the "EASY" part. What you do from then on will determine whether it is an acceptable installation and whether it will have drainage problems.
  4. Gary Swart

    Gary Swart In the Trades

    Messages:
    7,358
    Location:
    Yakima WA
    What the previous replies are tactfully trying to tell you is that you can't just stick pipes together and call it a drain. Plumbing just isn't that easy. You need a plumber to make the proper connections and do the venting.
  5. Ze'ev Garber

    Ze'ev Garber New Member

    Messages:
    5
    Location:
    Massachusetts
    Thanks for your reply
    All of my fixtures will have individual vent coming from the ceiling
    Old toilet had cast iron 2" vent that was connected to 1 1/2" PVC pipe that goes to the roof
    I'm planning to connect all vents to it in the ceiling
    I'm more concerned with 90 degree elbow before connecting to the old stuck
  6. Ze'ev Garber

    Ze'ev Garber New Member

    Messages:
    5
    Location:
    Massachusetts
    This is exactly why I'm asking a question here
    I'd like to understand if in 4x4 space I can connect all the fixture drains
  7. Terry

    Terry Administrator Staff Member

    Messages:
    15,124
    Location:
    Bothell, Washington
    What you have is a start. It's how it finishes that decides it.
    So far what you have to look at is fine.

    No-Hub couplings above ground do need to be shielded though to prevent shifting of the pipes over time.

    Last edited: May 17, 2012
  8. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,825
    Location:
    Cave Creek, Arizona
    The elbow "appears" to be the correct one, but it is hard to tell because of the angle. The "Fernco" coupling would NOT be approved in this area for use inside the building. as far as the space is concerned, you could put it inside a 4" x 4" space IF you could fit the pipes into it.
  9. Cookie

    Cookie .

    Messages:
    5,658
    Location:
    .
    I see you stated you are from Ma., and, I don't know if you are aware of this or not, but, MA prohibits any plumbing work at all except by licensed plumbers, that is your state law. Just so you know, Jeff.
    Last edited: May 17, 2012
  10. Tom Sawyer

    Tom Sawyer In the Trades

    Messages:
    3,227
    Location:
    Maine
    Ah so you are expecting folks to follow the rules? Good luck with that LOL
  11. Cookie

    Cookie .

    Messages:
    5,658
    Location:
    .
    Nope, but, I would want to know.
  12. patrick88

    patrick88 Plumber

    Messages:
    836
    Location:
    Webster Ma.
    Yes and if you get caught you will be forced to have it all removed on your dime. ;)
  13. Ze'ev Garber

    Ze'ev Garber New Member

    Messages:
    5
    Location:
    Massachusetts
    Please take a look at the pictures

    I have dry fitted washer drain. Does this look right? Bathroom trap seems to be the biggest concern.
    What can be wrong with its shape?

    Thanks.

    And BTW I'll have this work inspected. IMG_0353.jpg IMG_0351.jpg IMG_0352.jpg
  14. Tom Sawyer

    Tom Sawyer In the Trades

    Messages:
    3,227
    Location:
    Maine
    Can't use a running trap on the tub in Mass. Your plumber should know better. Did he pull a permit?
  15. Ze'ev Garber

    Ze'ev Garber New Member

    Messages:
    5
    Location:
    Massachusetts
    Alternative ptrap for bathtub

    IMG_0354.jpg IMG_0355.jpg Can you please give your opinion on this one as well
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