Sink Pipe goes up?

[JewishBacon]

We had a pipe in the ground break. My plan is to go through the wall and bypass the broken pipe which goes through the foundation.

We have an AAV.

Any thoughts on why this pipe appears to go up and down? I was expecting it to go down into the drain line through the wall but there's no upstairs so I'm not sure why this would go up at all?

I'm hoping to drill through the wall from the outside and just connect into the line if that makes sense.

 

[JewishBacon]

Zimages

 

[jeffmattero76]

It goes up so that air can get in.

 

[JewishBacon]

It goes up so that air can get in.

Even though we have an AAV? I thought the AAV removed the need for that

 

[jeffmattero76]

I call the aav a "cheater vent". Yes, it will allow air in, but it sucks conditioned room air rather than outside air. I am not a plumber, but I believe a real vent is far superior.

 

[Diehard]

If that AAV was under that sink, you show in the picture, you would have to ask the person who put it there, why they did it.
Maybe there was a problem with a slow running drain and they figured maybe it was a vent problem.