If your home’s plumbing vent is clogged, you may be able to clear it using a plunger. To do this:

  1. Locate the vent in question. It is typically located near the roof or top of a wall, and may have a metal cover.
  2. Remove the cover if necessary.
  3. Place the plunger over the opening of the vent and push down firmly until the obstruction is dislodged. Be careful not to hit your head on the roof or walls while doing this! ..