someday I'll be a plumber but for now still need advice on venting

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by petros151, Nov 16, 2011.

  1. petros151

    petros151 New Member

    Messages:
    11
    Location:
    PA
    I need some advice on venting/. It would be very difficult for me to run a vent line except in one place where I can get it up to the roof and out.

    I'd like to use "Y" connections as in the diagram to hook up a vent system. It's all for a 1st floor set up and the only way waste is going out of the house
    is via a horizintal run in the basement.

    I wonder how far away can the sink be in this set up. The toilet will be about 8" from the vent pipe

    thanks!

    Attached Files:

  2. johnjh2o1

    johnjh2o1 Plumbing Contractor for 49 years

    Messages:
    1,142
    Location:
    South*East
    Horizontal vents must be 6" above the flood rim of the highest fixture. In your case it would be the sink. Plus the vent for the sink is below the trap making the trap a full S which is not allowed.

    John
  3. petros151

    petros151 New Member

    Messages:
    11
    Location:
    PA
    ok thanks, that dashes my plans for an "Easy" way to vent. I'll rethink this. In the meantime anyone have any ideas? There is no way to run vertical pipes that I can see. Maybe one way is to put the toilet out 6" further from the wall and put the horizontal vent run above the sink floor rim as you suggest and enclose in a chase or part false wall.



  4. petros151

    petros151 New Member

    Messages:
    11
    Location:
    PA
    someday I"ll be a plumber but I still need some advice on venting NEW IDEA

    how about this?

    by the way does the horizontal vent pipe have to slope up ?
    THANKS!

    Attached Files:

  5. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    21,817
    Location:
    New England
    You can combine vent lines, as said, if they join at least 6" above the flood rim, or 42", whichever is higher. To account for condensation, rain, or backup, yes, the vent line needs slope to it just like a drain.
  6. petros151

    petros151 New Member

    Messages:
    11
    Location:
    PA
    ok this may not be too hard after all. Funny thing one plumber came over and told me I could vent a sink drain below as in the first drawing, what a problem that would have been if I had not posted and gotten your input and let him do that! THANKS! This is a great forum. Wish I knew more to answer things. If anyone needs help on music production let me know!

  7. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,279
    Location:
    Cave Creek, Arizona
    If that pipe ends at the left side, then you ONLY need a 2" vent for the sink and it will vent the toilet also.
  8. petros151

    petros151 New Member

    Messages:
    11
    Location:
    PA
    wow!

    Wow thanks for this tip!

    I redid the diagram. So then I would need to run a 2" pipe as the drain pipe into the horizontal sewer line ( A and B) as shown and then connect
    a 2" elbow and a 2" horizontal run (C) and then the 2" vertical run (D) up to the roof and I'm done? So then I can just use a regular P trap pipe and shoot that
    into the 2" drain/vent pipe and it will vent the toilet. Cool. Now is there anything to be gained by having the toilet fitting have a Y to attach to the vent?

    Will it vent "better" than the scaled down version in this diagram? or just the same?

    The toilet will be about 12" max from the end of that pipe by the way and the lav will be right next to the toilet.

    I"ll be a plumber yet!

    Attached Files:

  9. cacher_chick

    cacher_chick Test, Don't Guess!

    Messages:
    3,237
    Location:
    Land of Cheese
    This is called wet venting the toilet through the lavatory.

    Might be worth mentioning that the connection between the vertical risers and the horizontal main line need to be wyes, not tees.
    The fitting at the sink should be a sanitary tee.

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