What if the engineer doesn’t know what is causing the drainage issue?
Unfortunately, a high percentage of your drains are not visible, this can make it difficult for our engineers to find the problem if the issue is not obvious.
- Spock (rhp)Lv 71 month ago
this is what a powered snake is used for. if that's not enough, a robotic camera on a power lead can be used to crawl into the drain and allow the technician to see what the problem is ... after with, he'll know the exact location in which to dig