mongo

I'm not sure that I follow your interpretation. The vent starts at the point that it connects to the drainage pipe/stack.

A floor mounted water closet is vented at the point of connection of the soil pipe/stack and the vertical pipe that is used for the vent. In every case, it is below the flood level rim.

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nhmaster3015

TM, My whole family lives down there. I lived in Punta Gorda for almost 15 years.

Stillaround. You are interpreting code the wrong way. The code tells you what you can not do. It's up to you to figure out what you can do.

I was a member of the state code review board for 12 years and this subject came up more than once. We unanimously agreed that if used in a venting configuration, there is nothing in the code that prohibits its use.

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TheMaster

I'm not interpreting. I'm telling you where I consider the vent to start in the context of long or short fittings being installed. In other words......if it can possibly have waste water in it..even during a clogg....I'm considering it as part of the drain when I'm choosing what fittings to use.

Just my preference,I dont recite code much.

mongo

Ok. got it now.

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house plumber

Well in my 20 year carreer in plumbing I have never been able to use a sanitary tee on it's back that is used in lieu of a combo ( wye and 45) unless it's under a 3 compartment sink. Here is that chart that says you cant. By the way NH, I'm doing a house down in Punta Gorda right now.



TABLE 706.3 FITTINGS FOR CHANGE IN DIRECTION

TYPE OF FITTING
PATTERN CHANGE IN DIRECTION Horizontal to
vertical Vertical to horizontal Horizontal to horizontal Sixteenth bendX X X Eighth bendX X X Sixth bendX X X Quarter bendX Xa Xa Short sweepX Xa,b Xa Long sweepX X X Sanitary teeXc --WyeX X X Combination wye
and eighth bendX X X

house plumber

oh snap. The chart didnt turn out right. Anyway the 2 dashes and squares means NO.

Richard Hilliard

Using it as a dry vent is allowed as NH has stated.

nhmaster3015

But 706.3 is drainage, not vent.

I get where all of you'se guys are coming from, for years I thought the same thing.

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stillaround

I'm glad you have had some experience with boards etc. but I have to totally disagree with that posture of code interpretation. A plumber should look 1st if there is something he cant do which is spelled out usually more clearly and defined. Florida code has changed for simplification and they dont want a tee on its back...which I agree with. The Florida code is not your code in Maine...it makes no sense to ignore the table 706.3 and then imagine what you can do......they dont want tees near drainage for good reason and are now allowing combos in the upright position for fixtures where san tees were always used. I think they took rodding issues and future issues into consideration when they simplified the table. Could it be written more clear...yes. Is it clear as it stands...absolutely. Does it matter what used to be or where it is allowed differently...not in the least. Any plumber advised to use a tee on its back in view of the code would be misled.

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house plumber

The 3 x2 I'm talking about is used on drainage. It catches a shower. He used a 3 inch trap up stream from the tee. Everyone knows you can use a tee on vents.