Found this in client's home in Wisconsin. Assuming the open 1-1/2" vent under the sink serves as venting and assume it isn't tied to a roof vent stack. Also assume the trap at bottom serves same purpose an AAV would do to prevent sewer gases from coming up under sink.
My question is...
1) why do they have this coming out of the stack under the drain line
2) is this adequate of meet code for venting
3) should we add an AAV to top of the vent or is that redundant considering it has the trap
Much thanks in advance for the wisdom and experience of those taking the time to reply
My question is...
1) why do they have this coming out of the stack under the drain line
2) is this adequate of meet code for venting
3) should we add an AAV to top of the vent or is that redundant considering it has the trap
Much thanks in advance for the wisdom and experience of those taking the time to reply
