AAV or vent

[mathew stouffer]

This trap are is about 8 inches. Is an AAV or vent required prior to the line down sloping.

[Scott Patterson]

This trap are is about 8 inches. Is an AAV or vent required prior to the line down sloping.

A plumber who knows how to plumb sinks properly is needed!

[Tom Rees]

Mathew, It looks like handyman plumbing 101. I also write up the flexible pipe; One or more sink drains use flexible drain pipe. This type of drain pipe is more likely to clog than smooth wall pipe. Recommend having a qualified plumber replace this pipe with standard plumbing components (smooth wall pipe) to prevent clogged drains. Must be nice up there in PC when it's this hot down here.

[Bruce Booher]

That is called a "S" trap for good reason, and is "illegal". Do you know for sure what is behind the wall? Are you sure there is no tee and vent?
AAV and a vent aren't really alternatives, the AAV is a different type of vent. If you are sure there is no vent pipe in the wall and the owner/buyer/whoever isn't going to run a pipe vent, I think the AAV is a good alternative. The "S" trap needs to go. There should be no need for a flex pipe with all the room they have under there.

[Tom Rees]

It looks like if they made the tail pieces longer they could go straight into the wall without the need for the inverted trap at back. I'm not a plumber but I could do better than that.

[Ron Hasil]

They should of came out of the wall with a 45 degree elbow, a short peice a pipe then a trap adaptor. Then they could of used a standard P-trap. The way they did this it makes an S-trap.