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-jettin... https://www.wholetoolbox.com/ridgid-63902-pressure-washer-pressure-gauge/63902.html