What is the life expectancy of the pump found in my unit? Your pressure washer unit uses a wobble-plate piston pump with an average life expectancy of 300 to 500 hours of usage. Related articles My pressure washer is leaking from where the garden hose goes into the pressure washer. Snow Joe MELT10EB-J Premium Enviro Blend Ice Melter w/ CMA | 10-Lbs. What is the difference between the 24V-SS10 and 24V-SS10-XR? Find Your Snow Joe / Sun Joe User Manual (All Models) Keep Your Sun Joe Pressure Washer Running Leak-Free