Is this still considered an S trap?

[Jim G -DIY]

Hello all,

I am a long time lurker with a great appreciation for the knowledge on this forum. Most of the time my questions and concerns have been addressed by others but I thought I would ask about a situation on my home remodeling project.

I had a plumber rough in a drain for an sink in my master bath. There were some electrical obstructions and I was left with a drain entry very low on the wall. I can get (barely) a standard P trap installed but I was curious if I could offset the entry point as shown in the attached sketch.

Any advice would be appreciated.

Jim

 

[Plumber69]

Hello all,

I am a long time lurker with a great appreciation for the knowledge on this forum. Most of the time my questions and concerns have been addressed by others but I thought I would ask about a situation on my home remodeling project.

I had a plumber rough in a drain for an sink in my master bath. There were some electrical obstructions and I was left with a drain entry very low on the wall. I can get (barely) a standard P trap installed but I was curious if I could offset the entry point as shown in the attached sketch.

Any advice would be appreciated.

Jim

View attachment 46885

That's an S trap. To do it this way you will need a autovent

 

[Sponsor]

 

[Sylvan]

Unless it connected to a "proper" vert not an AAV you will be ok

 

[Jim G -DIY]

The drain line is connected to vertical vent pipe a few feet away.

 

[Asktom]

That is an S trap. You need a vent after the trap before the line drops down. Otherwise the trap can syphon and whatever gasses are in the sewer can enter your home.

 

[Terry]

Done that way is will siphon. I've had to go back and fix those for people. Too many complaints for smelly sinks.