A blocked vent can siphon water out of your P-traps, allowing "rotten egg" smells (hydrogen sulfide) to enter your home.
A clogged vent stack is more than a nuisance; it’s a disruption to the air pressure balance your plumbing needs to drain properly. Experts from Benjamin Franklin Plumbing and Roto-Rooter highlight that these blockages often stem from bird nests, fallen leaves, or even ice buildup during winter. Eyman Plumbing Heating & Air +2 Common Symptoms If your vent stack is blocked, you will likely notice: 12 sites How to Tell if Your Plumbing Vent is Clogged Oct 7, 2020 — clogged vent stack