What is smoke testing?

Smoke testing is a routinely used procedure during which smoke is forced into a gravity sewer line using a fan or blower at low pressure. If there are any holes, cracks or other defects in the sewer line, smoke will seep through and visually identify the problem area.

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1. What is smoke testing?
2. Is the smoke toxic?
3. As a property owner, is there anything I need to do before smoke testing is performed in my neighborhood?
4. What is sewer cleaning?
5. Will the cleaning affect me?
6. What is closed circuit television and will it affect me?