Tree roots frequently clog drain line
I live in a 43 year old townhouse condo, where my main (cast iron) sewer runs past a tree in the common area which frequently clogs the line with roots. Problem is, I get no warning it's gonna clog until my guest bath toilet overflows. The toilet is the lowest open drain in the house. Since I'll never be able to remove the tree and since rooting out the line several times a year is getting expensive, I was wondering if there is some kind of overflow tank or system I could install and keep an eye on? Any other tips on keeping the line open, short of replacing the line? Anyone had success with lining the pipe?
Thanks in advance.