Abstract: A portable power rinse system which can be truck-mounted and has a rinse pipe, drum support arms and nozzle mounted in off-center relation within the vessel so that a drum can be inverted into the vessel and the rinse nozzle inserted into an opening at one end of the drum and the drum tilted in different directions about the support arm for thorough flushing of the contents of the drum which are removed through a drain hose at the lower end of the vessel. A manifold with a flow control valve regulates flow of a rinsing liquid either into the rinse nozzle in the vessel or to an externally located, hand-operated spray for rinsing out the interior of the vessel as well as other smaller containers to be flushed or rinsed.