Can P-trap have a horizontal input?

[Andrewdbis]

See picture...not quite a running trap but not quite a p-trap...anyone have a reason this is NOT okay? References would be great!

Thank you

 

[Sylvan]

Trap is fine BUT where is the vent?

 

[Sponsor]

 

[Andrewdbis]

Trap is fine BUT where is the vent?

No vent... left side is from the washer standpipe and the right side goes right into the main sewer.

 

[Sylvan]

Then you have a problem

 

[Plumber69]

I avoid these unless absolutely necessary