given work volume, This factor requires that substantially higher horsepower pumping systems be used as the work volume increases exponentially on larger diameter machines. Aqueous-based parts washers use alkaline detergents mixed with water to clean parts. This solution is safer than solvent-based systems because the risk of the cleaning solution catching fire is eliminated.<ref>http://w3.gsa.gov/web/p/hptp.nsf/0/00ff1961fc2 The detergent for an aqueous parts washer may be in the form of a powder or a liquid. Each form has its advantages and the particular parts cleaning application will determine the best form. In general, powder detergents are the more aggressive and typically used in maintenance and rebuilding operations while liquids are more commonly found in lighter cleaning applications that were once commonly the domain of vapor degreasers. Jet spray vs. power wash processes A jet spray washer cleans by flooding the parts with warm chemical solution and high chemical concentration to clean the parts. In the power wash process the parts are blasted with hot chemical solution utilizing the hydraulic impact force of the cleaning solution as the primary cleaning mechanism. A parts washer utilizing the power washer process operates at a very low concentration of cleaning detergent. The lower concentration causes the cleaning solution to last longer before it becomes supersaturated and requires disposal. Additionally, a low concentration of cleaning chemicals allows for easier rinsing of the detergent from the parts thereby minimizing rinse cycle requirements thus saving water and cycle time. A final factor used in the power wash process is an oscillating manifold system that is non-synchronous to the rotation of the turntable. This system assures that the blasted solution reaches all areas of the parts load that are otherwise blinded by the stationary manifolds used in the jet spray process. All things considered the power wash process is superior to the jet spray process for faster more thorough parts cleaning cycles while minimizing detergent use and waste generation. The power wash process is generally effective for difficult soil removal applications such as burnt hydrocarbons, paint, scale, varnish, carbon, mastic, or rubber.<ref>http:// Additional power wash types of applications generally include cleaning diesel engines, aerospace components, aluminum automobile engine parts and rolling mill equipment. There are some considerations when using the "power wash" process in that comparatively high horsepower, thus high-current motors requiring an adequate power source, are utilized with correspondingly high washing pressures that require the parts to be adequately secured