First a little doubt on the purchase due to the compatibility with my old karcher but ultimately no worries only tried the pipe drain cleaner but really effective we were amazed dirt that might accumulate on the walls !!!! plugs destroyed very easily and we spent two hours more minutes to clean the walls of the pipe! for the price, 20 m are ideal I recommend this product to anyone who like us have regular problems with the drains. I think that given the large cleaning done we will no longer plugs before very long!