This is a great replacement pump for your worn out pump. This unit is designed for daily use and it is perfect for contractors..  This pump is capable of producing up to 4000PSI at 4.0 GPM but it will work great on any smaller washers with a 1"...

1" Horizontal Shaft Pressure Washer Replacement Pump 4000 PSI 4.0 GPM 3400 RPM 1/2" FPT Inlet, 3/8" FPT Discharge Anodized, Die-Cast Aluminum Crankcase Solid Ceramic Plungers Stainless Steel Check Valves Buna-Textile V-Packings Reversible...