new toilet in cabin

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by msuchodo, Apr 3, 2008.

  1. msuchodo

    msuchodo New Member

    Joined:
    Apr 3, 2008
    Hello, I am planning on installing a new toilet in a cabin that is seasonal and currently only has an outhouse. i will be installing a 300 gallon septic tank this spring and the only fixture will be this toilet. The roof is sharply pitched and I am a little concerned with climbing on it to cut a vent hole.
    a couple of questions.
    1. do i need to vent if this is the only fixture on the line? (read somewhere i dont)
    2. could I use a studor vent instead of outside vent pipe?
    3. from the attached pic, which way should i vent - directly off the vertical run or can i pick up off the horizontal?
    4. do i use a sanitary T or wye for the horizontal pickup?

    thanks
     

    Attached Files:

  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Joined:
    Sep 2, 2004
    Occupation:
    Retired Systems engineer for defense industry.
    Location:
    New England
    Are there no other items that will attach to the drain? No sinks, etc? You'll need a vent for the system, and while you could probably do one from the septic tank, most people perfer to have it higher up so it can get dispursed easier (i.e., on the roof). The vent serves two purposes, allows air flow so you don't get a vacuum which can suck adjacent drains dry, and to allow the system to vent any gasses that may be generated by the wastes decomposing.
     
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  4. msuchodo

    msuchodo New Member

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    Apr 3, 2008
    Correct, there are no other items on this line, only the toilet
     
  5. Gary Swart

    Gary Swart In the Trades

    Joined:
    Sep 1, 2004
    Location:
    Yakima WA
    A Studor (aav) vent cannot be the sole vent in a system. There must be a vent to the outside.
     
  6. msuchodo

    msuchodo New Member

    Joined:
    Apr 3, 2008
    Thanks, any thoughts on the T or Wye for the horizontal vent?
     
  7. hj

    hj Moderator & Master Plumber Staff Member

    Joined:
    Aug 31, 2004
    Occupation:
    Plumber
    Location:
    Cave Creek, Arizona
    vent

    The vent off the top of the tee would be one way to do it properly.
     
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