Karcher Universal Garden Hose Connector for Electric Pressure Washers, Steel, 1/4-Inch Fitting, Fits Multiple Brands, Includes Filter in the Pressure Washer Parts department at Lowes.com
Karcher 25 ft. 3600 PSI Universal Replacement/Extension Hose for Pressure Washers - Quick-Connect/M22 8.756-105.0 - The Home Depot
For Karcher K2-K7 High Pressure Hose Adapter from M22 to Quick Pipe Replacement | eBay
M MINGLE Compatible Pressure Washer Adapter, Replacement for Karcher Power Washer Accessory, 1/4'' Quick Connect - Walmart.com