Is The Smoke Hazardous?

"Superior Smoke can be used without hazard if applied as directed. The main effects of the smoke are some minimal irritation of the throat and an awareness of an odd odor. These effects act as a warning and are desirable to prevent voluntary overexposure."

While the smoke is not considered harmful, it is recommended to avoid prolonged periods of exposure. If smoke appears from a drain in your residence, open windows and ventilate well to dissipate the smoke. You should be aware as well that if smoke can enter your residence, so can potentially harmful and toxic gasses. A licensed plumber will be able to repair the problem.