Clogged vent pipesnPlumbing systems include special ventilation pipes that are made to adjust the air pressure inside of the pipes. A vent pipe usually sticks out of the roof of a building, where it introduces fresh air into the plumbing system, and releases gases and bad smells from the pipes.Feb 18, 2021,
Septic odors are caused by gases in the system, including carbon dioxide, hydrogen sulfide, and methane. Not only can they be annoying, a high enough concentration of these gases can be toxic, or even explosive.Jan 27, 2016
Causes of Plumbing Vent Odors: You get odors in plumbing from what's inside the pipes, so if you have a clog, the sludge inside the pipe can be causing the foul odor. It doesn't have to be human waste, it can come from hair, soap, skin cells, body washes and other stuff that makes its way into the drain.