Intermittently an odorous stench rose from the basement of our new home. We gave the plumbing contractor a callback to help us pinpoint the problem. In a manner of minutes the problem was resolved, A temporary roof vent terminal cap had not been removed after construction. At the time, removing the cap to make the stink pipe fully operational seemed like an easy fix.
Unfortunately we soon discovered a new “stink” situation. Occasionally the roof vent exhaust would be caught in a downdraft bringing the unpleasant odor to our outdoor living space. The proposed remedies required a roof vent terminal fix; extending the pipe, install a return bend (90 or 180 degree bend (depending on the fix source)) or install a vent filter. Regardless of what remedy we choose, it will have to wait until the spring thaw.