The Karcher Pump KM5030R.3, 5.1GPM@3000PSI, 1550RPM (8.751-191.0) is designed and engineered exclusively for pressure washers. It features a forged brass manifold, large capacity die cast anodized aluminum oil-bath crankcase with precision guide rod, and oversized connecting rods for maximum life. With a heavy-duty tapered roller bearing, solid corrosion resistant ceramic plungers, stainless steel inlet and discharge valve assemblies this pump is as durable as it is effective.