What do you think? Lav and Shower waste and vents

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by akantler, Jan 26, 2010.

  1. akantler

    akantler New Member

    Messages:
    16
    Location:
    Alaska
    Okay...I've been impressed at all the helpful information on this forum. My husband and I are DIYers and are building our own home. It's a timber frame which makes plumbing a real pain with all the beams in the way. This is our first floor bathroom. The vent and drain line are running horizontal to our vertical plumbing chase that extends all three stories. Nothing is put together yet, we want feedback. We are sure if we have the right fittings in the right places...(I am aware that the drain has a break in it right now too)

    Any suggestions... things that must be changed. We are in Anchorage and have found some difficulty finding local code rules.

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  2. nhmaster

    nhmaster Master Plumber

    Messages:
    3,189
    Location:
    S. Maine
    I'm not a big fan of the double san tee on the lav drain because if you have to snake the drain through the sink the cable has a tendency to shoot right across instead of going down.
  3. johnjh2o1

    johnjh2o1 Plumbing Contractor for 49 years

    Messages:
    1,143
    Location:
    South*East
    Is that shower drain 1-1/2"? The vent can be 1-1/2" but the drain must be 2".

    John
  4. akantler

    akantler New Member

    Messages:
    16
    Location:
    Alaska
    Is there a different fitting, or are you a fan of different overall setup?

    The shower drain and vent are 2"
  5. Terry

    Terry Administrator Staff Member

    Messages:
    15,110
    Location:
    Bothell, Washington
    You would normally use a fixture cross between two lavs, not a double santee.
    The trap arms can be 1.5"
    The p-traps will be 1.5" anyway.

    UPC now requires a combo on the shower vent.
    Years ago, they let you use a santee for the vent there.

    [video=youtube;usdLvw1Z8CQ]http://www.youtube.com/watch?v=usdLvw1Z8CQ[/video]
    Last edited: Jan 27, 2010
  6. Marty53

    Marty53 New Member

    Messages:
    44
    Location:
    New York
    What about putting a cleanout right below the fixture cross. Thats how I setup my master bath, as per a pixture terry had up of a similar setup.
  7. akantler

    akantler New Member

    Messages:
    16
    Location:
    Alaska
    Terry, where else does code enforce a combo be used for venting? Thanks...Jill
    Last edited by a moderator: Jan 27, 2010
  8. Terry

    Terry Administrator Staff Member

    Messages:
    15,110
    Location:
    Bothell, Washington
    I think a call to the permit center is in order to find out what code you are under.
    I just gave a call to my plumbing supplier in Anchorage, but they didn't know either.
  9. Akpsdvan

    Akpsdvan In the Trades

    Messages:
    1,486
    Location:
    Alaska
    If you are with in the city limits, the city should be able to help out, if out side of the city limits... then you could use them as a guide.
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