Drain Vent ing- How Wrong Is This?
A friend is having a two-story addition put on her house, The venting for the bathrooms is obviously messed up, but I'd like for someone to tell me how many ways it's wrong.
Lower bath with toilet, tub and one basin are all vented up with a single 1 1/2" sched 40 pipe, which then has a 6' horizontal section in the attic to join with the 1-1/2" vent from the upstairs bathroom (1 tub, 1 shower, 1 toilet and a 2-basin lav) which includes another 6' horizontal (NO slope)section. The vents join to a single 1-1/2' sched 40 vertical section that, as of now, vents into the attic. (I'm hoping that the plumber at least plans to go through the roof)
I didn't have the time to note all of the details, but this gives a general picture of what I saw.
My friend is getting another plumber to evaluate it, but I'd like to give her some specifics so she can see if the second plumber is any better.