I managed to unclog a 30mm water pipe in which a metallic object had fallen and rusted. It dissolved it and came out in fragments of rust in the toilet bowl.

You press the trigger and the hose moves on its own in the pipe because it shoots water backwards. Generally, it does the job for simple blockages. In my case, it didn't work but it was very difficult.

This one fits all amateur models of Nilfisk pressure washers.

It had clogged an external faucet hose that connected to kitchen waste at some point. The "blockage" occurred in a pipe with a diameter of about 3 centimeters due to leaves, hair, and possibly food scraps, while it had also caught some debris. I initially tried various other methods, but there was no result, so I decided to use the drain cleaner. With 4-5 insertions and removals, it cleaned the pipe and came out "walking" on its own from the other side (about 6 meters long with 1 bend). We may have recovered the cost of the purchase (23 euros) with this first use! If we had called a plumber to clean it and possibly cut it, we would have paid at least 20 euros! That is, if it didn't require breaking concrete, etc.

The above process was done with a Nilfisk 135 bar pressure washer. -The power may decrease with a machine of lower power.

As for the negatives: It is not as flexible as I would like. Seriously consider -depending on the potential needs that may arise- purchasing the 15-meter drain cleaner from the same company.