In addition to portable units, we have an Ibak truck-mounted crawler camera; a state-of-the-art televising system that allows us to look not just straight ahead, but left, right, up, and down to most accurately discover the problem inside the pipe.  Our camera is effective in pipes anywhere from 4 inch to 60 inch and can be mounted to our 4-foot raft for a clear picture even in a high-flowing pipe.