PVC Tee's in vent installed wrong

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Old 02-21-20, 05:56 AM
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PVC Tee's in vent installed wrong

Toured my house with a plumber yesterday. He looked at a couple of PVC drain lines that I had installed 20 years ago and pointed out that two of the 2" sanitary tees were installed with the curve in the wrong direction. Both tees connected pipes that were part of the vent system, one for a shower and one for a vanity. They went directly to the attic and tied into the house vent. He said it didn't matter, they were wrong and he would have to replace most of the PVC pipes in that bathroom.

Whatever happened to the three rules of plumbing?
1. Water seeks it's own level
2. "Stuff" floats
3. Air don't care

I agree that the tees are in wrong but in this case does it matter? The plumber is working from an already agreed contract price so he's not trying to pad the job.




 
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Old 02-21-20, 06:09 AM
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Only you can tell. Have you had any problems in the past 20 years?
 
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Old 02-21-20, 06:33 AM
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The plumber is a plumber and you are not so if you trust him take his advice.
Especially when there is no advantage for him in doing this.

I do not know what the entire job entails so perhaps the new pluming could cause problems here.
Sounds like he does not want to do a job and then get a call later saying that there is a problem.
Recalls can eliminate a profit margin!
 
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Old 02-21-20, 09:24 AM
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Zero problems with the plumbing. I talked to him today and he said our local inspector is strict on plumbing and he didn't want to wait until rough in inspection and get told it was wrong. My guess is that it's not a code thing he just didn't want to get into a p***ing contest with the inspector.

I was just curious why a vent tee direction matters.
 
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Old 02-21-20, 10:15 AM
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By code, the vent tees need to be oriented in the direction of the airflow. The concept is to allow the air to flow easier with less restriction.

As you figured out, in practice, it probably doesn't matter much and in most cases, a backwards tee won't matter in a drain or a vent - but code is code. If you're getting it inspected, the inspector should call it out and fail the installation.
 
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Old 02-22-20, 10:02 AM
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My guess is that it's not a code thing he just didn't want to get into a p***ing contest with the inspector.
No, it is a code thing. Generally an inspector is only allowed to inspect the work the permit covers, but if this vent is vital to the work being performed I can see how the inspector's jurisdiction would extend to it. What didn't make sense to me is why he can't just replace the tees and stop at that. But, "He said it didn't matter, they were wrong and he would have to replace most of the PVC pipes in that bathroom." Why replace all those pipes if just the two sanitary tees were wrong?
 
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Old 02-22-20, 11:01 AM
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Just a guess but to me it looks like it would be easier to assemble the run of PVC pipe and then just make the hookups to the fixtures. The house is gutted and everything is exposed. Along with the fire involved plumbing (all bathroom fixtures were scrapped) the heating system (boiler and baseboards), the well pressurizer tank and HWH are being replaced. The permit reads something like "post fire restoration of the house plumbing system" so I guess everything is in play.
 
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