Winter is a reality in Western Canada and therefore so are frozen ducts/conduits. Because all of our HydroVac trucks have water heaters, a hose can be connected to hot, pressurized clean on board water to a device called a jetter. The jetter is inserted in the pipe/duct and using the forced hot water melts the ice ahead of itself and rear facing jets propel the jetter forward. The ice is melted and all the water is forced out of the pipe/duct. As the HydroVac is there already, all water that is flushed out is vacuumed up.