- 5.5 GPM at 3500 PSI w 1125 RPM
General Pump Solid Shaft Pressure Washer Pump with Side Sight Glass. 5.5 GPM @ 3500 PSI. The preferred pump frame in the pressure cleaning industry. Forged brass manifold with an exclusive lifetime warranty. Forged brass manifold with an exclusive lifetime warranty. Large-capacity, die-cast, anodized aluminum oil-bath crankcase. Over-sized connecting rods for maximum life. Heavy-duty tapered roller bearing. Solid ceramic plungers with continuously lubricated packings. Unitized stainless steel inlet and discharge valves.