Not for Roots or Clay Pipes
Sewer Jetters are generally safe for cleaning indoor drains, and for cleaning outdoor drains made of plastic (PVC and ABS), provided the pipe is in good structural condition.
However if attempting to clean an outdoor drain made of metal or clay that could have preexisting cracks caused by tree roots or shifting soil, the compact nozzle could pull itself through a crack.
Should the sewer jetter tip pass through a preexisting crack in an outdoor metal or clay drain, the high-strength hose could get stuck and further damage the pipe when you attempt to pull it out.
You can contact us for assistance if you need to clean an outdoor drain made of clay or concrete (ceramic), metal, or tar composite (Orangeburg) material.