When evaluating a sewer inspection crawler, it’s important to determine how well it adapts to different challenges—both current and anticipated. To make this determination, it helps to look at whether the crawler was designed as a standalone system or a modular platform. A standalone system is one which serves a narrow purpose; it does one kind of inspection (CCTV, SAT, side scanning, laser profiling, etc.) within a limited range of applications (combinations of line size, condition and material). So for instance, if you buy a CCTV inspection crawler to do mainline inspection, and you later want to expand into lateral launch inspections, your only option is to buy a new, separate crawler system: crawler, reel, controls, and truck.