(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 10 of 10

Thread: vent through a wall

  1. #1
    Plumber Esquire's Avatar
    Join Date
    Nov 2009
    Location
    Newfoundland
    Posts
    65

    Default vent through a wall

    I got asked a question today and I'm not certain of the answer.

    There is plumbing in a square metal building. There is a vent that needs to terminate outside. Can the vent be brought out the side of the building? There are no windows or doors near the termination point. There is no eve above where it would terminate either.

    Could you terminate out the wall and 90 up to have it vertical (going above the roof level is possible too)? if run off water from the roof is an issue is hooding the vent acceptable? For some reason the owner of the building thinks he is more likely to have trouble with a leak at the room termination than at the wall termination point.

    Just wondering anyone has input on this and more so wondering what the code would think about it.

  2. #2
    Master Plumber-Gas Fitter shacko's Avatar
    Join Date
    Jan 2006
    Location
    Rosedale, Md
    Posts
    561

    Default

    Most areas do not allow plumbing on the outside wall of a building, but this could vary locally, you have to check with you local jurisdiction, sorry.

  3. #3
    Plumber Esquire's Avatar
    Join Date
    Nov 2009
    Location
    Newfoundland
    Posts
    65

    Default

    The plumbing is all on interior walls it would only get to the outside wall where it is going to terminate.

  4. #4
    Forum Admin, Expert Plumber Terry's Avatar
    Join Date
    Aug 2004
    Location
    Bothell, Washington
    Posts
    14,209
    Blog Entries
    1

    Default

    Normally you would extend through the roof.

  5. #5
    Plumber krow's Avatar
    Join Date
    Feb 2008
    Location
    Ontario, Canada
    Posts
    906

    Default

    It is allowable to go through a wall, but you need to exit at 45 degrees and extend to above the roof and any change of vertical direction must be 45 degrees. There should be no horizontal runs where there is a possibility of water accumulation.Minimum 3" diameter pipe
    Attached Images Attached Images  

  6. #6
    Journeyman & Gas Fitter Doherty Plumbing's Avatar
    Join Date
    Jun 2009
    Location
    Penticton, BC
    Posts
    810

    Default

    Krow nailed it. In Canada you are allowed to have a vent outside of the building as long as the vent is always kept nominally vertical. And he's right about the 3" as well. You need it to be 3" because of frost closure. So this could really cause you some issues because if you're piping downstream of the vent isn't 3" already it needs to be!

  7. #7
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,673

    Default

    Frost closure would be a possibility with ANY extended outdoor pipe and the longer it is, regardless of the size, the more likely it is to occur, ESPECIALLY if the weather is such that there are few warm periods which would thaw any accumulation out of it. I doubt that Newfoundland has many warm Winter days.

  8. #8
    Plumbing Designer FloridaOrange's Avatar
    Join Date
    Dec 2005
    Location
    SW Florida
    Posts
    1,317

    Default

    In Florida you can but it appears that's a rarity. No vented soffit or openings above and must be min. 10' above grade and you can exit 90* from the wall and use a wallcap.
    Matt
    Semi-professional plumbing designer
    Enjoying life in SW Florida

  9. #9
    Journeyman & Gas Fitter Doherty Plumbing's Avatar
    Join Date
    Jun 2009
    Location
    Penticton, BC
    Posts
    810

    Default

    You right but the code is more referring to climates where you get REALLY cold. Where I live they never require you to increase to 3" for frost closure. But if you went 5 hours north they might....

    But the inspectors around here do like to see all 1.5" vents increased to 2" right before they terminate through the roof because of frost closure issues. How much does it help? Probably not much but they like to see it and they have the final say.

  10. #10
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,673

    Default

    When I was in Chicago, EVERY vent penetration had to be at least 4", but pipes 4" and larger had to have it increased by 1". Here in Phoenix, I have seen installations where ALL the drain lines are on the exterior of the building.

Similar Threads

  1. Heat vent on the shower Wall
    By yomero in forum Shower & bathtub Forum & Blog
    Replies: 1
    Last Post: 09-28-2009, 05:57 PM
  2. Vent termination: above roof -vs- out the wall
    By Carradine in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 2
    Last Post: 02-08-2009, 05:54 PM
  3. AAV vent & trap in wall
    By Alpac in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 6
    Last Post: 03-30-2008, 11:30 AM
  4. wall/ceiling bathroom vent
    By Blank in forum Remodel Forum & Blog
    Replies: 6
    Last Post: 09-19-2007, 09:13 AM
  5. Bathroom Exhaust Vent. Soffit -vs- Wall.
    By bjferri in forum HVAC Heating & Cooling
    Replies: 4
    Last Post: 06-07-2007, 05:41 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •