The Ridgid 63902 Drain Cleaner Pressure Gauge monitors water pressure during operation of compatible RIDGID drain cleaning equipment. The gauge provides a pressure reading to help the operator observe system pressure while using the machine, supporting proper operation and control during drain cleaning tasks. It is listed as a pressure gauge for RIDGID KJ-1350 and related water-jetting and drain-cleaning equipment. This replacement component can be used when the original gauge is damaged or no longer functioning properly, providing a practical solution for maintaining accurate pressure monitoring during routine equipment use.