When seen for the first time you wonder if this is not a joke, well no. It's super effective, to meet some not we do not put it on a Karcher as it stands on its own. It solved all our problems of clogged drains, but this one replaces the one we have exploded and had been loaned us. It is true that after 4 hours of utilsation a row he was tired. It is a product recommended because it is mechanical and green.