Doesn’t sound right to me. I would bitch to my city council person. Flush some copper sulfate crystals down your toilet a couple times per week to kill the roots.
***Flush some copper sulfate crystals down your toilet a couple times per week to kill the roots.***
A friend of mine did that. It killed every tree on the local line.
He then had a rotary cutter company come in. They rooted out his line and left. He still had problems so he called a different roto-rooter company.
They hit a blockage which would not budge, so the pulled out their cutting head, and caught in it was the cutting head which had broken off from the last rooter company he had called.
Once that was out of the way, they then rooted out the line and he never had another problem.
Yup, root killer helped clean out our pipes too. Something you mix x + y, get it in fast, and don’t flush for 5 hours. (Can you tell I am NOT a chemist?).