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 Rough In DWV layout Help
Author: maine-ah (ME)





Looking for some advice - photo shows currently where I am at with DWV rough in on 2nd floor bathroom renovation. I am an electrician by trade so plumbing codes and best practice are somewhat outside the comfort zone.

Basically wondering if I am on the right track with wet venting the shower with the Lav? Or do I need to pull another vent off the shower trap arm and tie in with the lav revent back to the stack?

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 Re: Rough In DWV layout Help
Author: hj (AZ)

Links and pictures do not work

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 Re: Rough In DWV layout Help
Author: maine-ah (ME)

[@#$%&[s32.photobucket.com]][/URL]

[@#$%&[s32.photobucket.com]][/URL]

Thanks for the heads up - lets try this. Photos should be here now.

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 Re: Rough In DWV layout Help
Author: packy (MA)

flip the 2 inch "Y" the other way so the branch is facing to the bottom of your picture. run the 2 inch shower drain into the back of that 2 inch "Y". roll the branch up and put a 2 inch street 45 into it looking towards the sink. keep that 2 inch all the way to the vent stack.

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 Re: Rough In DWV layout Help
Author: maine-ah (ME)

Do you mean something like this?

[@#$%&[s32.photobucket.com]][/URL]

Rolling up the 45 on towards the sink Helping to provide a wet vent for the shower? Using two 45s for the 90. And change to all 2" prior to dry vent. Does that sound right?

Thx for the help!



Edited 1 times.

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 Re: Rough In DWV layout Help
Author: packy (MA)

you have the "Y" facing the wrong way but that is it.

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 Re: Rough In DWV layout Help
Author: maine-ah (ME)

Aha I see that now. It was running the wrong way. Only other question is, is it going to be okay running these 90s? They would be long ell 90s. The sink drain will be up and over a joist in the wall (right side of photo).

Also can I roll that wye less than 45 heading to the sink? 2x8 joists- I'm going to run out space I think for pitch.

[@#$%&[s32.photobucket.com]][/URL]



Edited 1 times.

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 Re: Rough In DWV layout Help
Author: packy (MA)

it is not super important that you roll the "Y". it will not clog as it is being washed by the sink. (classic wet vent). BUT.... you need to vent the sink. a sanitary tee where the top 90 is located is how you would vent it.. if maine allows AAV's (studor vent) you can put one under the sink as a vent and use the 90 instead of the san tee.

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 Re: Rough In DWV layout Help
Author: maine-ah (ME)

Understood on the vent, will absolutely send that up to attic and re-vent back to stack. However I think my prior drawing was weak. See below. The sink is over a couple stud bays. I was thinking of using a 90 up into wall and using two 45s to offset over to a Santee where the sink stubs out. From there vent out the top of Santee. Not sure if this is two many bends? Trying to stay away from chopping my joists up too badly.

Also should vent stay at 2" in this scenario? All wet pipe I've shown will be 2". Thanks so much again for all your help!

[@#$%&[s32.photobucket.com]][/URL]

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 Re: Rough In DWV layout Help
Author: packy (MA)

just 90 the 2 inch pipe straight up the bay where the pipe is. put the 2 x 2 x 1 1/2 san tee in that bay (where the point of the arrow is). look the 1 1/2 inlet of the san tee over to the sink. drill thru a couple of wall studs for the 1 1/2 inch trap arm. the arm can be 5 feet long by code. set the center of the san tee about 18 inches off the floor.

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 Thanks :)
Author: maine-ah (ME)

Genius - I like it. I'm guessing you just use a 90 degree trap adapter to stub out the wall for the sink?
Thanks!!



Edited 1 times.

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 Re: Rough In DWV layout Help
Author: packy (MA)

you wouldn't be so quick to call me a "genius" if you saw my wiring skills...
i put a small 220V electric heater under my shop desk. wired it with #12 wire back the panel. i used one of those mini double 20A breakers never knowing both powered leads came off the same leg in the panel. SOB... the fan would run but it would not heat. fortunately i was working on a job when the local electrical inspector came in. i asked him and he laughed, called me a name i can't write here and gave me a proper double 20A breaker that contacts two seperate legs in the panel..
good luck on your project..
don't be afraid to come back with more questions if needed...

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 Re: Rough In DWV layout Help
Author: maine-ah (ME)

Haha - yeah that is a pretty good one, can't say i've come across that one before (yet). Easily confused though, looks like it would be a 2 pole breaker!.. but its not :) . Really appreciate all your help, you may hear from me again if I find myself scratching my head during this install.

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