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Author:
JollyMon (NC)
Hi I'm doing the rough plumbing on a simple bathroom in the room over my garage. Consider this to be new construction since the area has just been used for storage until now. Not a lot of space to work with since the footprint is a 24'x24' with a 9/12 roof pitch.
With the proposed layout I'd like to start with the lavatory being the first fixture in line using a 2" wetvent. The lavatory drain line would join the watercloset drain and lastly the shower drain would enter. With using a 2" wetvent for the lavator and it being upstream I'm hoping not to have to vent the other two fixtures separately.
Any thoughts?
Thanks Rob
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Author:
packy
one of these behind the toilet would do it.
3" branch goes to the toilet. 2" side inlet for the shower. run 2 or 3 out the top for a vent and tie the lav drain into that vent.
there are many ways of doing this but this is the simplest.
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Author:
North Carolina Plumber (NC)
The shower drain will have to tie into your 2" wetvent. If you tie it in the 3" downstream of the toilet it will require its own vent.
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Author:
Doug E. (CA)
yes, left or right side inlet san tee.
wet venting lav sounds smart.
first build your isometric and discuss with plumbers
to see if plan is to code.
good luck.
Edited 1 times.
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Author:
JollyMon (NC)
Thanks everyone....that looks like a winner Packy!
Edited 1 times.
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Author:
packy
remember, there are limitations as to how far the fixture trap can be from that sanitary tee.
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Author:
hj
It is also not usually the best for an "upstairs" bathroom since it can impact the headroom below it.
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Author:
packy
it is a garage. i assume it has a high enough ceiling to drive an F450 with roof racks into.
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Author:
JollyMon (NC)
1st floor ceiling height 9'8"....
But the 3" toilet drain line looks like it's going to take a 6 foot run to the san tee. is it going to need a vent?
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Author:
packy
no, the lav, shower and toilet will all vent up thru the top of the san tee.
to be clear, you can put a 3x2 bushing in the top of the san tee and run 2" thru the roof. use a 2 x 1 1/2 san tee at 19" above the floor for the lav drain. you can run that 5 feet without a vent. the shower you can run 6 feet without a vent.
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Author:
hj
It could be an 8'-0" ceiling like the house has. FEW garages are big enough for an F-450 LWB with any kind of racks.
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Author:
hj
From your description, the shower will need the vent.
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Author:
hj
How about a diagram of the bathroom's floor plan with the fixtures shown on it. All these "ideas" are predicated on a specific floor plan, which may NOT be yours.
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Author:
packy
in mass, a 2" trap can be located 6 feet (developed length) from it's vent. using a side inlet san tee actually drains the shower into the stack higher than the toilet, hence the shower is stack vented as is the lav.
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Author:
hj
Same here, but we do not know WHERE he is putting the lav and shower in relation ship to the toilet.
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Author:
JollyMon (NC)
[s980.photobucket.com]
hope this image makes it through this is a rough idea of the floor plan.
Edited 1 times.
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Author:
hj
The advice you have been given regarding using a side inlet sanitary tee and a 2 x 1 1/2" tee in the toilet's vent riser, will NOT work for that configuration. Re.; "main drain line runs this way", is that drain line already installed?
Edited 1 times.
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Author:
packy
if you could move the vanity to the wall that parallels the ridge pole and relocate the door, the plumbing advice as given will work.
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Author:
JollyMon (NC)
well, nothing has been installed. just trying to figure out the best configuration. The 9/12 roof is a big factor in placing everything...how do you get into the shower/head area..etc
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