Hi Guys.

I will make a new bathroom in my attic (zinc, toilet, shower). The building is basement, two floors and attic.
- I found in the attic the main waste drainage going to outside the roof 4" And I found an additional pipe 2" for vent, connecting to the main pipe close to the ceiling roof.
Questions

- Can I to connect the (new waste pipe 3") in the same attic?. Considering that currently I have an additional pipe (2")for ventilation
.. or I have to connect new 3" waste pipe under the second floor.
From Connecticut.
Thanks
George

This is LA code from 2000, Map it out and then call your building inspector, because laws can vary
http://www.ecodes.biz/ecodes_support/free_resources/Louisiana/Locked_PDFs/Chapter%209_Vents.pdf

Do you have a permit? Plan on getting one for an attic bathroom.

[Edited - told I'm wrong. The last 4 houses I owned (and my current one) had bathrooms above each other with bathrooms all draining into one main, with shared vents going up next to the stack, connecting just below the roof as this person described. Sorry if I'm getting something confused. But even reading the code, I think I'm right. And although I am not a plumber, I have done DIY plumbing. Correctly.]

Jorge you my want to read here it sound about like what your doing. Good luck https://www.askmehelpdesk.com/plumbing/adding-full-bathroom-attic-788844.html

Hi All!

You found a STACK VENT in the attic and an additional vent from a bathroom or bathrooms below. Since this is a fact, you DEFINITELY need a new waste pipe and in most cases it will need to be run into the basement.

I don't know why Joypulv would comment on such a complex question as this one...She is NOT a plumber in any way! Further, you would NOT call a building inspector for this. You might try to consult a local plumbing inspector, but since you are in CT you will most likely be told that you need to hire a licensed plumber for the job...PERIOD!

Parttime referenced a good link to start at George... start there and then post back with more questions.

Mark

In planning out this project you also have to take into consideration the attic joist. Usually attic joist are just ceiling joist for the room below. As such they are usually 2x4 on 24" center. Not sufficient to serve as floor joist.

Hi Joypulv

Yes, you are definitely getting "something confused"! I hate to be the plumbing police here, but you should NOT be answering questions about waste and vent systems. Heck, many plumbers with years of school and field experience have trouble with the design of waste and vent systems, so don't feel too bad, OK?

Your first answer (which you edited), was definitely wrong and with so many licensed plumbers on the page here to answer these tougher questions I just don't understand why you (and a couple other people) bother to answer them when they could seriously mislead someone? Please stick to the simpler questions WHICH YOU ALWAYS ANSWER VERY WELL, but when vent and waste questions pop up please let one of the licensed plumbers (or Harold or Bob or Talaniman) answer them.

Thank you for understanding!

OK!
I don't know how I was wrong. I even read the code. And all my houses etc...
I also answered because 2 hours had gone by and I figured you guys were all taking time off this week. I did say to map it out, call the inspector, and get a permit. That covered my butt.
Could someone draw a picture of how this attic bathroom has to be plumbed????

I did say to map it out, call the inspector, and get a permit. That covered my butt.

No, that isn't what you said. You said, "No, you do not need another waste pipe" (since deleted by you).

You then said, "This is LA code from 2000, map it out and then call your building inspector, because laws can vary". What does LA code have to do with CT code... especially an outdated code from 2000? You are aware that codes change about every 5 years or so and that each state has its own very specific code set, right? Further, telling someone to call a BUILDING inspector with a plumbing question is just setting them up for trouble! A building inspector's job is not to answer plumbing questions... that is for the plumbing inspector and even then plumbing inspectors do not or will not answer plumbing questions from homeowners unless they specifically address a plumber, a plumber's license or a plumber's business or employee because like 45 states in the USA do not let homeowners do their own plumbing or pull plumbing or gas permits. Addressing CT specifically, they definitely DO NOT allow homeowners to do plumbing or pull plumbing permits!

Finally, for me or anyone else to draw this up for you would be pointless as it would not address George's specific setup as we cannot possibly tell what he has going on behind the walls or in between the walls and floors! What we do know is what started this all and that is that he will indeed need another drain pipe (you said he didn't) and where it connects into the drainage system can only be determined by opening up the walls (or removing a medicine cabinet or two, or opening and access panel at a closet, etc.) to see how the bathrooms under the proposed attic bathroom are all connected.


Mark

Mark - I didn't change any of my response other than to delete the first sentence.
I'm in CT and there is no such thing as a plumbing inspector in any of the towns around me; just 'building' inspectors. CT is mostly small towns. I've seen the CT code for waste not too long ago.
But ... I STILL can't figure out why ALL my homes have had ONE shared 3 or 4" drain/stack/vent with a 2" vent for sinks and tubs.
I could go on but you are angry and I'll bow out, wishing I could have deleted this whole thing! Merry Christmas, Happy New Year, BYE

Joypulv,
In the state where I live ( CT ), the owner of a single family residence, can apply for a plumbing permit, and, perform the work, as long as he / she is an occupant of the home. We have a uniform code, that all towns abide by - the 2009 IRC, and the 2012 IPC.
There can be many challenges when trying to connect to an alleged stack vent, as massplumber2008 has pointed out, however, it may be worthwhile to make some wall / floor / ceiling openings to inspect the existing dwv system; you may find a correctly plumbed vent stack - this would allow connections at the stack vent for fixture drainage on the third floor............

All is interesting and I was unaware that CT allow homeowners to do their own plumbing... so few states left that allow that!

With that being said, I still think the plumbers on the page (includes you, too) should be the first to answer these complex questions. Joypulv actually does a great job on so many questions, but I have asked her to leave the tough ones for the licensed plumbers here as I think her answers in those cases add a lot of confusion sometimes is all.

Joypulv, please reread post 6 again. I swear, there is no anger...more respect than you might think, but we have discussed this before and I am really just trying to protect the page to the highest standard that I can.

Happy Holiday to all!!


Mark

Mark,
All New England states, except Massachusetts, allow single family homeowners to apply for a plumbing or electric permit, and, perform the work. The homeowner is required to do the installation, however, abuses are wide spread; many will hire an unlicensed individual to do the work at a lower cost than a fully licensed / insured company...