During a sewer smoke test, smoke will emerge from various locations along the sewer line. If the smoke comes out of a designated area – like a vent on your roof or a manhole cover – then it can signal the line is functioning normally. If it comes out of another location, then it can signal an issue at that place in the line. Some locations you might see smoke in these instances is in your yard or through cracks in the street.
If your plumbing is installed correctly and is functioning as expected, you should not get smoke in your home. If smoke does enter your property through an incorrectly installed sewer venting system, pipe, or sump pump, you can rest assured that the non-toxic smoke should not cause any harm to you, your family, your pets, plants, or furniture.