Addition of bathroom and washer

Discussion in 'Remodel Forum & Blog' started by piper2, Dec 16, 2013.

  1. piper2

    piper2 New Member

    Messages:
    8
    Can i do this? I am helping a friend do an add on of shower,toilet wash box and vanity. The question is--- do i have to vent shower which is down stream of the toilet? the lay out will be as follows--- toilet at far end of run then 3x2 wye for vanity (venting from there) then shower 2", the washer box 2" and onto the old 3" under old portion of house, so im not sure if another vent is needed. Its all basically in a straight line from wc to tie in except a turn under old portion at that point ill add a co.


    3x3x3 y w 45 w co (end of run), 3" lr to wc flng, 3x2 y w 2" 45 to vanity (about 8') and 2" vent to roof, 3x2 y (about 2') p trap to shower, 3x2 y (about 5')p trap to washer box then thru wall make turn w 3x3x3y w 45 w co, then 15-18' to tie in w 3x3x3 y w 45, so simple yes?

    I think this will work just not sure about vent for shower being down stream of wc, please advise.
  2. leejosepho

    leejosepho DIY scratch-pad engineer

    That would not concern me since the vent is there for the shower and not for the toilet. However, I would be a bit concerned about the nearest venting for the toilet being eight feet downstream.
  3. piper2

    piper2 New Member

    Messages:
    8
    no no the vanity is about 8 ' from wc vent is at vanity
  4. Terry

    Terry Administrator Staff Member

    Messages:
    15,303
    Location:
    Bothell, Washington
    The shower needs to be vented before it enters the main line that the toilet is on.

    The washer needs to be vented before it enters other plumbing lines or stacks.
  5. piper2

    piper2 New Member

    Messages:
    8
    well that blows our plan out of he water...looks like 3 vents total, 1.5" each before entering 3" main run.
    Last edited: Dec 16, 2013
  6. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    27,056
    Location:
    Cave Creek, Arizona
    There can be a huge gap between how you describe your piping and how you actually install it. HOW you install it will determine what and where the vents have to be.
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