Super Max 8780 WS Pressure WasherPrice excludes freight. The Super Max 8780 WS is an electric cold water wet sand blaster pressure washer that combines portable and powerful pressure washer capabilities with the versatility of a commanding wet sand blaster system. As with all 8700 WS models, the 8780 WS is trailer mountable and can be purchased with optional two gun operation, but with a higher pressure (4000 psi) and flow rate (5 GPM) for added power. The included wet sand blaster