Yet Another Basement Plumbing (venting) question
I am in the process of having my basement finished with a full bath. While we had rough-ins before, they were in the wrong place. So, my contractor today busted up the concrete and laid the rough plumbing.
I am a complete novice when it comes to plumbing, and would like another set of eyes to make sure this is being done right. More importantly, I want to make sure this is going to vent correctly.
Based on the location, I am assuming we are going to need to use an AAV -- which I would assume is OK per code around here, because the rough-in that I did have when the house was built has an AAV siting on top of the drain pipe for the lav.
First, here is a picture of the plumbing layout:
http://www.flickr.com/photos/50001411@N00/308378057/
As you can guess, on the left is the shower drain, that then leads to the 3" toilet drain, and then leads to the lav drain (I am assuming). On the right side, just out of the picture, is where the lav is.
Here is another look at the toilet and lav drain:
http://www.flickr.com/photos/50001411@N00/308378060/
All this 3" pipe then leads down through the floor out to the main sewer drain connection:
http://www.flickr.com/photos/50001411@N00/308378062/
Kind of hard to see, but at the top of the picture is the front-wall of the hosue where the drain pipes leave the house.
First, does this look OK? Second, will an AAV work OK on the lav?
Thanks!