Tree root & drain line - delima ?
Perfectly okay to check the sewer pipe every year and not cut down the tree.
If roots enter the sewer pipe the roots will be thin at first. If your plumber discovers roots and clears them out then additional roots the next year will also be thin. But if you wait several years the roots inside the pipe will be fat and more difficult to remove.
To reduce wear on the inside of the pipe, have a video inspection to verify roots are there before putting down a snake.
There is still the possibility that roots just outside the pipe can get fatter and collapse (or squash) the pipe.
The disadvantages of crab apple trees. In summer, the apples are too sour to pick and eat. In winter the birds come and leave dropping all over the place.
Last edited by AllanJ; 02-21-2011 at 11:33 AM.