How to use the Kärcher pressure washer detergent sucker - YouTube
How To Attach Pressure Washer Detergent - Karcher Pressure Washer - Quick & Easy Soapy Water | This is how you use the detergent tube very simply and easy to do, works
Karcher Pressure Washer Detergent Suction Pipe Hose - Part Number 6.388-216.0 | Ransom Spares