It s quite possible that it is a vent pipe it could be from the toilet waste pipe venting out to the outside who ever installed it in the wall cavity did it for a reason so as not.
Vent pipe bathroom behind wall.
This revert is at least six inches above the overflow line and properly connected with a drainage t.
A drainpipe attached to the p trap goes into an opening in the wall.
How to fix a bathroom sink pipe in a tiled wall.
If the toilet drain does not connect directly to a vent you must find another way to vent it.
This works as long as all the plumbing.
The horizontal vent pipe runs right next to the closet bend.
You may need to cut a hole in the wall of the room above or below to guide the vent pipe up or the drainpipe down.
The roof vent pipes are the point where the replacement air enters your plumbing system as a fixture drains water.
If not drill a hole in the attic ceiling and have a roofer install a roof jack for the vent pipe.
In the attic you may be able to run the vent over to tie into an existing vent.
The termination point for the vent system is the roof of your house.
From the side angle it becomes easier to imagine what these pipes might look like behind your bathroom or kitchen walls.
When you flush the water in your toilet the odor will go smoothly through the vent pipe thanks to the process of equalizing the atmospheric pressure in the drain system.
Notice how the main vent and waste pipe remain separated behind the sink only connecting via the attached went pipe.
You can use many different types of rope including thickness colors and texture.
Toilet vent option 1.
If you have a leak or plumbing repair trapped behind a tile wall you may think the only thing to do is to rip open the tile and redo the tile job.
Guide and attach pipes.
You need to implement one vertical vent pipe to the top of your roof and it will vent the entire system.
You can also do a simple wrap or something more decorative.
Drain pipes take the wastewater to the soil stack.
These vent pipes also interconnect in many instances.
Through the stack sewer gases are carried up to the roof through vent lines.
For the most part each plumbing fixture has a vent pipe associated with it.
That open pipe connected to the waste sewer and pipes will supply air to the waste pipes.
Behind the wall where you can t see a vent line and drainpipe lead to a soil stack which is the control center of the wastewater system.