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Old 07-08-2017, 10:46 PM   #21
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Yes , I am. I asked my instructor about it last year . He said it's pretty much because of the old saying "air don't care" . It's just proper practice here. I do have to ask, as some of you are inspectors, and others are very knowledgeable, why does it matter? Honest question.

This is one where our code is lenient, and others go way above and beyond what is needed in UPC or IPC.
Example for whatever reason purple primer not allowed. Some codes you have to have it.
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Old 07-09-2017, 12:52 AM   #22
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Purple always with the exception of a finish. That was beaten into me from the beginning.

Work looks great to me!
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Old 07-10-2017, 01:42 AM   #23
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Quote:
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Looking at it a little closer (though from the angle of the pic it's really hard to tell), I think a few of vent tees are backward.

You are correct
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Old 07-10-2017, 01:51 AM   #24
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Quote:
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Yes , I am. I asked my instructor about it last year . He said it's pretty much because of the old saying "air don't care" . It's just proper practice here. I do have to ask, as some of you are inspectors, and others are very knowledgeable, why does it matter? Honest question.

This is one where our code is lenient, and others go way above and beyond what is needed in UPC or IPC.
Example for whatever reason purple primer not allowed. Some codes you have to have it.
The thinking on the vent fittings being turned with the direction of flow is just that,direction of flow,it's not all just about air in vents,rainwater and condensation also make their way into the vent system and if the fittings are not turned with the fllow of the air then the water will stand in the pipes cutting off the air flow in the vent,also someone may later on add on to that plumbing system and if the vent fittings are not turned the correct way it will not drain right
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Old 07-10-2017, 10:15 AM   #25
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Quote:
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The thinking on the vent fittings being turned with the direction of flow is just that,direction of flow,it's not all just about air in vents,rainwater and condensation also make their way into the vent system and if the fittings are not turned with the fllow of the air then the water will stand in the pipes cutting off the air flow in the vent,also someone may later on add on to that plumbing system and if the vent fittings are not turned the correct way it will not drain right

I will disagree somewhat. Just think about it, the Tee will drain either way. With the branch of the tee horizontal, no matter how it is flipped it can drain. In fact if the pitch is flat it has a better chance of holding water in the correct position.

If the branch is vertical the same applies.

To me it would have to be an extreme volume of air needed before it would make a difference. Drawing a max amount of air back through a wrongly positioned tee may cause a turbulence (never saw one) and cause a slight siphon, gurgling.

Just theoretical. Air doesn't care is a good thought but you can cause a restriction.
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Old 07-10-2017, 04:27 PM   #26
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I will disagree somewhat. Just think about it, the Tee will drain either way. With the branch of the tee horizontal, no matter how it is flipped it can drain. In fact if the pitch is flat it has a better chance of holding water in the correct position.

If the branch is vertical the same applies.

To me it would have to be an extreme volume of air needed before it would make a difference. Drawing a max amount of air back through a wrongly positioned tee may cause a turbulence (never saw one) and cause a slight siphon, gurgling.

Just theoretical. Air doesn't care is a good thought but you can cause a restriction.
t

You are correct also,I can't argue with it
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Old 07-10-2017, 07:30 PM   #27
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Thanks guys! This is some great insight and theory. I could see if you are maxing out your DFUs that flow "could" matter.. Especially with simultaneous use. Appreciate the critique and theory talk.
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Old 07-11-2017, 03:12 PM   #28
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Thanks guys! This is some great insight and theory. I could see if you are maxing out your DFUs that flow "could" matter.. Especially with simultaneous use. Appreciate the critique and theory talk.


you have got nothing to worry about... the backwards vent tees will work for probably about 200 years without an issue... Non pressured Venting air does not know or care what way a 2 inch pipe it is passing though is installed..... It will flow like the wind..... you could probably reduce it down to a 3/4 inch pipe and it would work (not recommended)

We got whole homes here in this state with 5 bathrooms in them all vented into just one 1 1/2 stack going out the roof and somehow they work fine....

I just like having the cleanouts above the unirals....someone down the road will thank you when that day comes.......
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Old 07-11-2017, 11:34 PM   #29
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Urinal clean outs should be code!

Edit: unless the urinal is tubular trapped.
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Old 07-12-2017, 11:21 PM   #30
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They are considered removed fixture, thus cleanout is not required.
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