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Author:
TimGS (NH)
I am looking for some advise. I am renovating the master bathroom and am adding a second sink in the master bathroom. The master bathroom is back-to-back with the guest bathroom and they share a common wet vented horizontal drain between the Lavatory sinks to main stack. I have two options that I am proposing for the drains shown on the following web page...
[www.timsmachines.com]
You might have to make your explorer window full screen to see the whole image.
What would you do?
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Author:
packy (MA)
tim, number 3 is a perfect way of doing it.
your naming of the fittings is wrong.
also, this is not wet venting it is continuous waste and vent.
the horizontal drain can be 2" but the combo's can be 2 x 1 1/2 for the one on the left and 2 x 1 1/2 x 1 1/2 for the one on the left. ( actually instead of combo's, use 2 x 1 1/2 "Y"s with a street 45 glued in the branch)the vertical san tees at each lav can be 1 1/2 and the individual vents can be 1 1/2". the inverted vertical san tee picking up the 3 vents can be 2 x 1 1/2 x 1 1/2.
hope this simplifies it for you..
so, coming from the stack you need a 2 x 1 1/2 "Y", a 2 x 1 1/2 x 1 1/2 "Y" and a 1 1/2 long sweep 90.
you need three 1 1/2 san tees for the vertical.
and you need a 90 and one 1 1/2 san tee to vent the lavs on the right and a 2 x 1 1/2 x 1 1/2 san tee on the left.
whew...
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Author:
TimGS (NH)
Thank You very much; I will update the option #3 today with that information.
Is option #2 viable? It would really mean fewer new holes in the existing studs, less work and lower cost. Does it violated IPC 2009?
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Author:
hj (AZ)
#3, or a version of it, is the correct way.
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Author:
hj (AZ)
A plumber could install a variation of #3 with fewer holes and less material, but it would still be more than #2.
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Author:
johnjh2o (FL)
If he uses #2 and it's connecting to the existing arm the new lines will be to high.
John
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Author:
TimGS (NH)
Thank You for your feedback. I will go with option #3 and the 1 1/2" PVC and a 2" drain and Vent. I will redraw the pictures and update the posting.
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Author:
TimGS (NH)
I updated to my site to include the installed images (See link above). I performed a drain test using the sink in the bathroom on the other side of the wall; It has never drained so smoothly or fast before.
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