Very effective. I led the discharge line of my toilet completely blocked 14m gaze rapidly and radically connected with this connection on my Karcher pressure washer Karcher K 3500. Easy to implement, however, be wary not to bend the connection passage in the pipe because of its winding storage. Indeed, the coupling retains its winding rather stiff making introduction into the somewhat delicate pipeline, this is both easier. The price is competitive and Amazon respects delivery. Easy to roll for storage.