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Author:
nelson07 (NY)
Okay, I have an old farmhouse and am trying to add a bathroom upstairs. The stringers are a true 2x8. I have to run the toilet line between two 8" stringers for about 14 feet. Therefore I plan on using 3" pipe so I get enough drop in the line. Between the toilet and the drain going to the basement. I was planning on looping in 2 in drains from the shower and a sink about 6 feet from the toilet.
Where the drain drops to the basement I was planning on T'ing the line and running a 3" vent straight up through the roof.
Suggestions or comments...will it work?
Also thought maybe I should do the shower seperately and take the 2" drain right into 3" where it drops?
I
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Author:
steve (CA)
Will it work and what is legal are two separate things. It would not be legal to have the vent that far away from the fixtures. You can accomplish this closer venting with a wet vent or separate fixture vents. We would need more info in the way of pictures/drawings to help with this.
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Author:
packy (MA)
it will work but it won't be even close to code..
run your 3 inch to the toilet. put a 3 x 2 "Y" for the tub. in that 2 inch going to the tub put a 2 inch "Y" for the sink. put a san tee into the vertical 2 inch pipe for the sink drain and run a pipe from the top of that san tee up thru the roof.
classic wet vent..
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Author:
hj (AZ)
It will "work" but it will NOT be venting any of your fixtures.
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Author:
nelson07 (NY)
Soo glad I posted here!
Okay, here is my original thought here. Where I have "drops to basement" is where I was going to T the 3" line and take it through the roof.
[www.dropbox.com]
What I am hearing is to do it this way....please advise.
[www.dropbox.com]
Thanks,
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Author:
packy (MA)
you are getting closer. the vent for the vanity can not come from below the floor.
you must keep that drain 2 inch in size and run it up the wall behind the vanity. put a 2 x 2 x 1 1/2 sanitary tee inside the wall at 19 inches off the floor and run a 2 inch pipe off the top and up thru the roof.
as i said before, classic wet vent..
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Author:
hj (AZ)
The second one is better, if you can get the pipes crossing inside your floor and the lav connected to the vent ABOVE the floor.
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Author:
steve (CA)
In drawing #2, you have the wet vent crossing over the top of the 3". I don't think you're going to have the room in an 8" joist bay to fit it in(or it's going to be very close). Drawing #1, with both the shower and vanity being vented would work.
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Author:
nelson07 (NY)
Okay, agreed. I will never get the 2" over the 3" pipe. How about this...I have both the sink and the shower dumping into the 3" line but I will have the wet vent on the sink 18" up the wall and out the roof.
[www.dropbox.com]
on another note, this house had no vent at all on the little bit of plumbing that was there downstairs. Should I take the 3" pipe out the roof as well where it t's into the floor or is this just a lot of work for nothing.
Edited 1 times.
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Author:
packy (MA)
if you have no full size vent going thru the roof, put a 3 inch sanitary tee where the drain comes up from below and call that the main vent stack.
also do as you have drawn and vent the lav with 2 inch so it wet vents the toilet. the tub will need to be vented as well..
bring your smaller vents back and tie into the 3 inch vent stack. this way you will have only one roof penetration..
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Author:
hj (AZ)
Shower is NOT vented, and the way you have it drawn neither is the lavatory.
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Author:
nelson07 (NY)
Okay, trying to figure this out. Can I vent the toilet by tieing it in to the wet vent for the sink? For the shower can I put a second line out to the 3" pipe going out the roof? Per the picture.
[www.dropbox.com]
OR THIS? Better Idea...
[www.dropbox.com]
Edited 1 times.
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Author:
hj (AZ)
NEither one of those would be acceptable the way you have them drawn. Now do you see why DIYers have problems trying to do their own remodeling. IT is more than just buying some fittings and pipe, then gluing them together.
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