Smoke testing (mechanical)
Smoke testing refers to various classes of tests of systems, usually intended to determine whether they are ready for more robust testing. The expression probably was first used in plumbing in referring to tests for the detection of cracks, leaks or breaks in closed systems of pipes.
A sanitary sewer manhole in Springdale, Arkansas with smoke coming out as a result of smoke testing for leaks
Smoke testing a sanitary sewer produces visible smoke at a residence in Springdale, Arkansas
A sanitary manhole is a manhole that is used as an access point for maintenance and inspection of an underground sanitary sewer system. Sanitary manholes are sometimes used as vents to prevent the buildup of pressurized sewage gas. Additionally, they are used for debris removal, and application of chemicals such as degreaser and insecticide.
A sanitary manhole under construction
A channel inside a sanitary manhole
Precast concrete barrel sections before installation
Cone section (black), base section (below the cone section), and stacks of grade adjustment rings of various sizes stored at a manufacturing plant