I installed a french drain on our property some 10 years ago to dry the floor in our barn and keep the horses feet dry. Well we had some roots intrude intrude into the pipework and I had to find a way to remove them. I could call a plumber or buy/rent an auger with a root cutter. But where is the run in that?
So I decided to make my own from a 5 gallon bucket and buying just the auger cable… Total cost $77. It is driven by a battery drill and works very well. I would say it has removed 90% of the roots which is more than good enough.