What is a vent, and what is its contribution to the plumbing system?
Vents protrude from every roof. They basically emit sewer gases from your home, and are therefore crucial to your plumbing system. For liquid to go down a pipe, it must be followed by air. Without vent pipes, the drain liquid would suck the air from the traps on the plumbing fixtures, and the unpleasant outcome will be the diffusion of objectionable odors in your home.
