SurfaceMaxx M22 Hose To Hose Connector in the Pressure Washer Parts department at Lowes.com
Amazon.com: POHIR Pressure Washer Adapter Set 8 Pack, 2 Different M22-14 Swivel to 3/8'' Male and Female Quick Connect, 3/4" Brass Garden Hose Quick Release Connector and M22 15&14mm to 14mm NPT
Powercare 3/8 in. Female Quick Connect x Male M22 Connector for Pressure Washer AP31041B - The Home Depot