I was quite skeptical about this because the comments are quite varied between the pros and the least I still took the risk of getting this leads everything was on sale because I figured the worst 15 euro in the trash at best 150 euro saving plumber. And the miracle connected to the garden tap and chemical products or had not done anything in a few seconds my problem clogged pipes for months has been resolved. I recommend a try before the plumber that has especially reusable unlike chemical products.