Venting a Bathroom Shower addition

[C02maker]

I am adding a new bathroom on to a second story. I have the vent at the highest point in the line followed by the shower and then running about 10 feet and dropping down into the basement. Right now I do not have anything else in the shower line. I am wondering if it is ok for the vent to be upstream of the shower drain. I am attaching a photo of my proposed plan. Thanks in advance for any thoughts on this!

 

[Terry]

Not the way you have shown. The vent should be vertical for the shower vent, unless you would be having a lav run in 2" which allows snaking to keep the line clear. The way you have it shown, the line won't pass an inspection. Normally I would run the 2" to the wall, install the vent vertical with a combo and then 90 back to pick up the shower.

Helpful Plumbing Hints for Residential Construction by Bert Polk Plumbing Inspector Lincoln County