Efficient connection: Provides a seamless, quick connection between the suction system and the tank, reducing setup time and improving cleaning efficiency. Compatibility: Specifically tailored for KARCHER models including 81, 101, 102, and 400 series, ensuring a reliable fit and consistent performance. Robust construction: Built from durable materials to withstand frequent use in demanding cleaning environments, delivering reliable operation over time. Easy installation: Userfriendly, tool installation that requires no special tools or expertise. Use scenarios Residential cleaning with KARCHER systems: Quickly connect and disconnect between the suction hose and the tank during routine floor and carpet cleaning tasks, saving time and reducing setup friction. Workshop or garage cleanup: Frequent hose and tank changes are common; this coupling enables fast, secure connections to keep work moving without tools. Vehicle and upholstery cleaning: Reliable fit and sturdy construction support repeated use when cleaning car interiors or furniture, improving efficiency during longer sessions.