How to tell if plumbing vent is clogged?
Plumbing vent pipes are designed to regulate the air pressure throughout your plumbing system. They can become clogged from a variety of things, from bird nests to rodent carcasses. Vents also provide an escape for wastewater gases and odors. Unclogging a vent pipe is difficult at best, taking preventative steps before you encounter a problem is your best course of action. The best way to start is to clear debris from around the pipe before trying to unclog it. To remove a clog, feed the end of a garden hose down the vent and have someone watch the inside fixtures for the clog to clear.