What are smoke tests?
Smoke tests are one way to specifically locate problems in a sewer system. A white vapor (smoke) is blown into the sewer main and will exit through deficiencies in the system. Such deficiencies are missing or broken clean outs, storm drains connected to sewer lines, down spouts connected, or cracks in sewer mains, etc. These problems lead to what the profession calls "i and i" (inflow and infiltration).

Inflow is were surface water enters the system (i.e., clean out or storm drain). Infiltration is where ground water enters the system either through manholes or broken pipe. Field technicians note the locations for repairs.

Show All Answers

1. What should I do if the sewer backs up into my house or business?
2. What is a cleanout and where is it located?
3. What should I do if my grinder pump has an alarm?
4. What are smoke tests?
5. What is the purpose of smoke testing?
6. Is the smoke hazardous?
7. Will smoke enter my house?
8. What are methods are used to locate system defects?
9. Will anyone contact me with test results?
10. What is a Cured-In-Place Pipeline Rehabilitation Project?