The Optima is a high-performance hot water/steam pressure wash washer. Complete with a Low revving heavy duty motor with thermal cut out that extends the working life of mechanical components. The Optima H4 has a crankshaft pump with brass head and ceramic pistons. High efficiency stainless steel boiler. This machine is for the Professional user and suitable for may uses. For example: car wash and valeting, haulier, industry, farming and food sectors etc.