Smoke testing one of the best and most cost-effective ways to locate defects in the main and lateral sewer lines. Therefore, many cities and municipalities implement sanitary smoke testing are their method to assess the sewer system.
Smoke testing identifies problems in the connected lines even in sections that were not known to exist. Although video inspection and other techniques are proven to be useful, there are times when research has shown that more than half of all stormwater flows in from somewhere other than the main line.
Experts recommend this to be done when the weather is dry, this allows smoke to travel to the surface. It is also a relatively simple process that consists of blowing smoke mixed with a large amount of air into the sanitary sewer line through a manhole.
