SIMPSON Replacement QC Plug for Pressure Washer Pumps Up to 4000 PSI, Steel, 3/8-Inch, Female M22, Silver in the Pressure Washer Parts department at Lowes.com
E4040HG Pressure Washer 4 GPM 4000 PSI GP pump | Pressure Works
SIMPSON SuperPro Roll-Cage SW4035HADM Gas Pressure Washer 4000 PSI at 3.5 GPM
SIMPSON Mobile Trailer (49-State) 4000 PSI 4-Gallons-GPM Hot Water Gas Pressure Washer in the Gas Pressure Washers department at Lowes.com
Simpson SW4060SUGL SuperPro Roll Cage 4000 PSI 6.0 GPM (Gas-Cold Water) Gear Drive Pressure Washer with Udor Pump and CRX Engine (49-State Compliant) - Spraywell