The BXD is one of Comet's core axial plunger pumps, built with a brass head, stainless steel plungers, a built-in Uniflow unloader and chemical injector, and Comet's patented ball bearing design. It runs at 3400 RPM on a hollow shaft with a flange for gas or electric engine coupling, and is widely used across light-duty and mid-duty pressure washers.