I'm confused which doesn't take much. I looked under my sink and the pipe coming out of the back of my cabinet travels horizontally into a curve and then travels vertically up to the sink.

Is this the correct way it works?

I guess I just don't know the starting point as I'm looking at the pipe.

That is correct. That is a "P" trap. If it were an "S" trap the pipe would come out of the floor.

I'm confused which doesn't take much. I looked under my sink and the pipe coming out of the back of my cabinet travels horizontally into a curve and then travels vertically up to the sink.

Is this the correct way it works?

I guess I just don't know the starting point as I'm looking at the pipe.

THe pipe starts at the sink, goes into a P trap and then continues into the wall.
The curved part holds water and "traps "sewer gas from entering the house.

Hi Mary and Welcome to The Plumbing Page at AMHD.com. You're responding to a 7 year old dead threads so I gave you one of your own. Please check the date before you post. Thanks
Your drain each is considered correctly. More questions? We're as close as a click. Good luck, Tom

Hello maryd,

See the attached images it may give you an idea, thanks.

John