Only two plumbing set ups could require sewer pipes in the attic.
Moving toilet vent pipe in attic.
Vent pipes supply fresh air to each plumbing fixture in the house which helps the system move water through the drainage pipes each time a toilet is flushed or a sink is drained.
If the problem just started it s probably a blocked drain or plumbing vent pipe that needs to be snaked out.
Vent pipes look like sewer pipes.
The roof vent pipes are the point where the replacement air enters your plumbing system as a fixture drains water.
And since the water in the toilet is dropping and gurgling it s likely that the problem is near that area.
Tie it in with a sanitary tee at a point above the drain of the topmost fixture that the vent services.
And you want to learn how to plumb a toilet with a 3 vent here s a free diagram demonstrating a popular way.
These vent pipes also interconnect in many instances.
The toilet s trap arm length aka trap to vent distance.
The pipe does not.
Plumbing air vents also prevent sewer gases from entering the home and allow wastewater gas and odor to escape.
Next thing you need to know is 3.
For the most part each plumbing fixture has a vent pipe associated with it.
Run 2 or 3 inch vent pipe from the fitting upward to the main vent stack.
During this phase it is highly recommended that you consult a plumbing inspector after measuring the length of your pipes.
The drain in the toilet bowl is basically a p trap.
The toilet s trap arm also referred to as the fixture drain is the pipe between the trap and the vent.
They can also tell you how to properly vent your pipes pointing out which one of the systems works best while satisfying local code.