A lot of the time, blocked drains are caused by tree root intrusion that requires the help of a professional plumbing company to remove them. Using specialised drain cleaning equipment, plumbers can identify the extent of the root intrusion using drain camera inspection technology. Once found, the plumber will perform a series of drain cleaning methods using highly specialised machinery. Roto rooters and high-pressure hydro jetting are two standard machines used.  After removing all blockages from the drain pipe and depending on the damage caused by tree roots, your plumbing company may recommend pipe relining to repair and restore the broken line.