Your drain clearing remedy might have worked for the foreseeable future, but only a qualified plumber has the tools to properly clear your blocked drain. Depending on how serious the blockage, your plumber can use a number of different tools, including: CCTV drain camera inspection Hydro jet drain cleaning Drain snake (or plumber's snake) Electric drain cleaning The hydro jet is the preferred method nowadays. It is the best tool at breaking apart tree roots thanks to its high-pressured jets of water which shoot out of a nozzle and slice apart blockages.