Commercial grade Honda engine with excellent weight to power ratio that is designed to be used all day, everyday.; Belt drive system keeps the pump RPM low and running cooler to extend its performance and life span.; Heavy-duty, splash lubricated pump with cast iron cylinders and aluminum body for optimum durability and performance.; Pilot unloader valve is an USA Conrader set to cut in at 140 PSI and cut out at 175 PSI.; Twin 4-gallon tanks are powder coated for added durability and each one has a ball valve tank drain port. Pre-drilled holes in the stabilizing brackets for mounting it into a truck or trailer.