When trees grow taller, naturally the roots underneath need to grow further down to support the tree. Unfortunately, if the tree gets too big, the roots could potentially break through the sewage pipes.
Metal Corrosion & Rust:
This type of occurrence usually happens on older homes. Since the piping installed is metal and exposed to moisture regularly, corrosion and rust is inevitable, which weakens the pipe and might cause it to break.
Ground Movement:
We have all experience the earth shift in one way, shape or form. California suffers from earthquakes more often than the rest of the US. The earth shakes, and movements can cause the pipes to break, bend, or even detach.
Heavy Water Pressure:
Too much pressure within pipes can cause them to burst or crack
Build-Up of Sediment:
Minerals from your tap water have the capability to build up within your sewer lines. Eventually, the build-up could block water flow or even pipes to break or leak.