Combined Vacuum and Jetting Truck Combined sewer jetting and vacuum truck is used for removing sand, stones, bottles, cans, grease, sludge and other debris from sanitary sewer and/or drain lines by the flushing action of high pressure water. The unit includes a positive displacement vacuum pump and a high pressure water pump. Combination jet/vac machine is equipped with self-contained water supply as the water source for the high-pressure pump and a cylindrical debris tank for collecting all materials coming from the sewer system . Combination unit is able to perform simultaneous high pressure flushing of sewer pipe and removal of liquids and solids from the sewer manhole.