Television Video Inspection
During regularly scheduled maintenance of both lateral and main line pipes, SacSewer field crews typically use TVIs to assess pipe condition and determine if the pipe needs any immediate cleaning or repair.
If cleaning is needed, a TVI is repeated to ensure the pipe is free of debris. TVIs are also done after any construction work to ensure that the work was done correctly.
For our smaller lateral pipes—which connect our main line sewers to customers’ homes or businesses—a small TVI system is used. The crew member inserts the camera into the pipe through a SacSewer cleanout.
For our larger main line pipes, a much larger camera is used. In those cases, the TVI camera is attached to a guide line and pulled through the pipe while an operator inside a special TVI truck views the images on a video screen and carefully documents any visible issues about the condition of the main line.Notes on the pipe’s condition and any observed issues from TVIs are recorded and kept in our database system. In most instances, a secondary review of TVI footage is completed by our in-office TVI technicians, who look for problems that might have been missed in the field.
Our office technicians make maintenance and repair decisions based on all available SacSewer inspection history. This lets us see what is occurring with the pipe over time so we can determine if any repair or ongoing maintenance on that particular pipe is necessary.
Of all the field work we do, TVI work has the least impact—and often no impact—to a customer’s property, as it involves only the insertion of a camera into the pipe through a cleanout or manhole.
