Do you think a 3-1/2" vent stack is moronic? I do.

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by hawkeyeerik, Jul 27, 2009.

  1. hawkeyeerik

    hawkeyeerik New Member

    Messages:
    6
    My vent stack roof boot is leaking. I'm guessing it has something to do with a 3" boot over a 3-1/2" vent stack.

    [​IMG]

    Is my roofer a moron or the plumber? I'm guessing the latter since boots come in 3" and in 4" and nothing in 3-1/2" that 10 mins of Google can find... I wonder what you think.

    I'm thinking I need to cut it off in the attic and make it 3". 4" if the city says so. Not a big deal... I just hate fixing other peoples' stupidity, and I think there was some involved.

    Also: separate rant. Anders Lign compression fittings (the ones with the integrated sleeve in the compression nut) are crap, and it's all the home stores sell now. 4 for 4, two different boxes of type-L 3/8" soft copper tube, all leaked. Going back to John Guest fittings

    Thanks for letting me vent

    Ha ha, get it?
  2. SewerRatz

    SewerRatz Illinois Licensed Plumber

    Messages:
    1,705
    Location:
    Chicago, IL
    So the inside diameter of that stack is 3 ½"? The O.D. of standard 3" PVC Schedule 40 PVC pipe is 3 ½" but the inside is 3". So apparently its the wrong roof flashing.
  3. hawkeyeerik

    hawkeyeerik New Member

    Messages:
    6
    Amazing

    SewerRatz, you are the reason I posted this. Sometimes you just need slapped by a stranger. It IS a 3" pipe.

    I still think a 3-1/2" vent stack would be moronic. Thinking 3-1/2" OD = 3-1/2" Sch 40 is more moronic. Thank you sir. Maybe the sewer gas made me delusional.
  4. SewerRatz

    SewerRatz Illinois Licensed Plumber

    Messages:
    1,705
    Location:
    Chicago, IL
    *chuckles* It is a common mistake lots of people make.
  5. FloridaOrange

    FloridaOrange Plumbing Designer

    Messages:
    1,317
    Location:
    SW Florida
    VTR's here typically have a lead wrap flashed into the roof.

    Similar to this.
    [​IMG]
  6. FloridaOrange

    FloridaOrange Plumbing Designer

    Messages:
    1,317
    Location:
    SW Florida
    And it also keeps the pvc from direct light.
  7. nhmaster

    nhmaster Master Plumber

    Messages:
    3,189
    Location:
    S. Maine
    What it is is whoever installed the flange didn't realize that they are supposed to be tight, real tight and it takes a bit of push to get the pipe through so they slit it instead. Find the slitter and place the blame. Oh, yes you have to replace it now, it will leak forever.
  8. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,626
    Location:
    Cave Creek, Arizona
    vent

    The "moronic" thing about a 3 1/2" vent would be the time and expense of trying to find ANY pipe or fittings in that size. You have a 3" vent pipe with a flashing that was installed by a moron. Unless the sleeve fits tightly around the pipe there is absolutely NO WAY it is not going to leak, unless you live in the middle of the Sahara Desert where it seldom, if ever, rains. The plumber may have furnished the flashing, but the roofer installed it while shingling. If he snipped it to install it, he was a moron, and if it was already cut and he installed it anyway, he was still a moron.
  9. Scuba_Dave

    Scuba_Dave Extreme DIY Homeowner

    Messages:
    885
    Location:
    South of Boston, MA
    Thanks for reminding me
    I need to put a flashing in for the future 3" stack on the new roof
  10. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,626
    Location:
    Cave Creek, Arizona
    flashing

    Put a piece of pipe through it so that it is sealed. You can connect to the pipe later.
  11. shacko

    shacko Master Plumber-Gas Fitter

    Messages:
    561
    Location:
    Rosedale, Md
    Hard to believe that someone is still using lead flashings on vents, thats pretty close to passe.
  12. TedL

    TedL New Member

    Messages:
    604
    Location:
    NY Capital District
    Note that if you carefully remove the "rubber" from a new, similar flashing, slide it down onto the pipe and adhere it to the cut rubber with, say, silicone, it will be raintight until you get around to replacing the full flashing, without any rush. It could last for years.
  13. FloridaOrange

    FloridaOrange Plumbing Designer

    Messages:
    1,317
    Location:
    SW Florida
    Still see them quite a bit down here. I also see alot of full rubber boots but whatever, I'm sure the OP got the point.
  14. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,626
    Location:
    Cave Creek, Arizona
    flashing

    Here they are almost all metal cones, other than lead when tile roofs are installed.
  15. hawkeyeerik

    hawkeyeerik New Member

    Messages:
    6
    Thank you all

    Thank you all for your input and commentary. This is how it is going to look until the fall.

    [​IMG]

    Questionable aesthetics,... yes. Patience to care,... depleted. House feels like it's falling apart faster than I can put it back together these days :D
  16. hawkeyeerik

    hawkeyeerik New Member

    Messages:
    6
    rain collar

    Thanks, our home stores don't carry them and I can't make it to the plumbers' supply during the day, so at first I made them myself.
    [​IMG]
    But, I was a moron and made them with 4" boots when I needed 3" so I whipped them in the trash furiously. When I bought the 3" boots I was lazy and just slipped the whole flashing right over.

    Getting a new roof in the fall... it was hard to care at that point :rolleyes:
  17. hawkeyeerik

    hawkeyeerik New Member

    Messages:
    6
    oh

    Oh, you meant as a permanent replacement. I just figured all new flashings with the new roof so I was just trying to stop the leak for now. I saw the Oatey rings online but thought they were meant to slip over and act as a rain collar, not as a permanent repair. Thanks for the tip.
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