At least one vent pipe that extends to the outdoor air at a dwelling should exist.
There are various components of a household plumbing pipe system. Supply pipes bring water into the house while drain pipes transport wastewater out of the house into the sewer system. There is another key component called a vent pipe.
A vent pipe is part of the drain pipe, but instead of carrying water, it provides an outlet for the air in the plumbing system. In other words, the vent pipe regulates the air within a plumbing system.
This ensures continuous and smooth flow of water, as otherwise vacuum could build up and stop the drainage process. It also removes sewer gasses, which not only gives off a foul odor but are potentially toxic.
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