What Is Ap Trap Vent

P-traps need vents 1 – They give the sewer gases a place to vent, so they do not build pressure inside your sewer lines. 2 – They prevent siphoning of the water out of the trap.

Do you need a vent with AP trap?

P-traps need vents 1 – They give the sewer gases a place to vent, so they do not build pressure inside your sewer lines. 2 – They prevent siphoning of the water out of the trap.

What is the difference between a trap and a vent pipe?

It turns out the trap is only half the solution to unwanted gasses. As water flows downward into the sewer, it can create a pressure differential between the two sides of the trap. … The vent also provides an escape for sewer gasses, where they disperse high above your home into the air.