If you are inspecting a system for a real estate transfer or troubleshooting a problem, it is important to know that the system was installed so wastewater will move from one component of the system to the next. In other words, that the system is set up to operate the way it was designed.
Relative elevations should be evaluated and compared to the system design and the required drop to flow by gravity through the system. To do this requires the use of a tripod instrument — either a transit or level (since these are more accurate than using a hand
