Rodding and hydro-jetting are the two most common ways to clear a blocked sewer or drain. Sewer rodding involves using a machine with a thin, flexible cable that is threaded through your pipes. Attached at the end of the cable is a cleaning head, with very sharp “teeth '' that are sized to the diameter of the pipe. When the machine is turned on, the cutter blades break up the clog into tiny pieces that are then flushed away down the pipe. Hydro-jetting utilizes a high-pressure stream of water to blast away extremely stubborn clogs and very heavy buildup on pipes. This method is especially effective on restaurant drain lines to rid pipes of heavy grease buildup. Hydro-jetting blasts away clogs and thoroughly cleans pipes, however, it does not damage them.