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  • Vent Tee installed upside down

    My boss wants me to prove to him, in code, that vent tee's are supposed to be put in upside down like the scanned picture shows.

    I cannot find anything other than 905.2 which states,

    "All vent and branch vent pipes shall be so graded and connected as to drain back to the drainage pipe by gravity."

    Here is a pic.
    Anyone can tear a man down, few can build one up.

  • #2
    Re: Vent Tee installed upside down

    That is a san tee upside down, a vent tee has no sweep.

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    • #3
      Re: Vent Tee installed upside down

      I read something like that in my code-book and thats the way I was taught to do it.
      I am too lazy to look it up right now, but you are right Tyman.
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      • #4
        Re: Vent Tee installed upside down

        This is my interpration of that section. The smoothest way for air to go down that line is if the tee is upside down. Another problem I have with the ipc is that it doesn't mention prohibted connections for venting. I fought with a civil engineer for almost 30 because he told us to use a saddle tee on a CI stack for a vent connection that would be behind a consealed wall. Billy bootcamp won because I couldn't find a specific reference in the ipc that prohibits that installation.
        Buy cheap, buy twice.

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        • #5
          Re: Vent Tee installed upside down

          Originally posted by Killertoiletspider View Post
          That is a san tee upside down, a vent tee has no sweep.
          Noted, is it correct then? If so, do you know the code number.
          Anyone can tear a man down, few can build one up.

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          • #6
            Re: Vent Tee installed upside down

            the fittings have to be installed in the direction of flow.

            since this is a vent, the flow direction is up to the roof.

            the photo in the book is correct and your boss is wrong

            rick.

            see if the 3104. 2 irc or 905.1 of the upc will apply.
            Last edited by PLUMBER RICK; 08-01-2008, 08:37 PM.
            phoebe it is

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            • #7
              Re: Vent Tee installed upside down

              There is nothing in the IPC or the UPC about it and if you think about it for a minute, air doesn't give a rat's butt whether or not the fitting is upside down or not.

              sigpic

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              • #8
                Re: Vent Tee installed upside down

                His argument is, that when snaking from the vent on the roof, your snake will be more suceptible to following the branch if the tee is install like that.
                Anyone can tear a man down, few can build one up.

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                • #9
                  Re: Vent Tee installed upside down

                  Originally posted by Tyman View Post
                  Noted, is it correct then? If so, do you know the code number.

                  We don't share the same code.

                  a vent tee looks like this.


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                  • #10
                    Re: Vent Tee installed upside down

                    Originally posted by Tyman View Post
                    My boss wants me to prove to him, in code, that vent tee's are supposed to be put in upside down like the scanned picture shows.

                    I cannot find anything other than 905.2 which states,

                    "All vent and branch vent pipes shall be so graded and connected as to drain back to the drainage pipe by gravity."

                    Here is a pic.
                    Nothing at all isn't clear in that wording, not to me at least.
                    Vents being connected to drain back is for rain, condensate and the occasional twig & dead critter to find it's way back to the main.

                    Comment


                    • #11
                      Re: Vent Tee installed upside down

                      Originally posted by Tyman View Post
                      His argument is, that when snaking from the vent on the roof, your snake will be more suceptible to following the branch if the tee is install like that.
                      ...and that too.

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                      • #12
                        Re: Vent Tee installed upside down

                        Another reason why I put them upside down is because its easier to identify a vent (in case it's in a tight spot or something and it's hard to confirm if a pipe is a vent or a drain). Most of the time, if the pipe was a drain, there would be a wye fitting there, but the way some places are plumbed, you never know
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                        • #13
                          Re: Vent Tee installed upside down

                          THIS WILL GET BATTED AROUND FOR AT LEAST 40 POSTS. I believe both are acceptable
                          Why is it labeled a vent tee,If it can't be used in that attitude? Ohh well I'm just a dumb Carpenter stirrin the RIDGID POT.
                          I can build anything You want , if you draw a picture of it , on the back of a big enough check .

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                          • #14
                            Re: Vent Tee installed upside down

                            Originally posted by toolaholic View Post
                            Why is it labeled a vent tee,If it can't be used in that attitude? Ohh well I'm just a dumb Carpenter stirrin the RIDGID POT.
                            I don't know why that is labeled a vent tee. A vent tee is a tee without any sweep. Weird. I didn't notice that in the picture the first time around.
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                            • #15
                              Re: Vent Tee installed upside down

                              Simple..."stink up, poop down, dont bite your nails on break, payday is on Friday." Around here they say it helps the "stink" go up.

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