[Noah930]

My plumber recommended root destroyer crystals every 6 months. Can be bought for $20 at any Home Depot/Lowes/etc.

We lived in our house for 16 years. We had roots in our main sewer line. Probably from a magnolia tree on the sidewalk in front of our house. Our house (1938) had a sewer line made from 16" clay pipe sections put together like Lego pieces, so plenty of opportunity for root ingrowth. When we first bought our house, every 2 or 3 years we'd have a clog which would necessitate a plumber snaking the sewer line of roots, but that was way cheaper (1/10) than replacing the whole thing. The last time we had it done, the plumber recommended root destroyer crystals. The only sewer line clog we've had since then has been due to "flushable" body wipes, but none more due to roots. I also used it in an outdoor pool patio drain system (where I could see the roots) at my parents' house with good success.