MFS Pro-4000 - Hot Water Power Washer with Wet Steam Add-OnMFS Pro 4000 Hot Water Power Washer with Honda 390X Engine. The ideal cleaning solution for commercial kitchen hoods and appliance cleaning, fleets and more! 4,000 PSI Pressure Power 4 GPM Water Flow 250F Wet Steam Honda 390X Engine Take your cleaning operation to the next level with the MFS Pro 4000 Hot Water Power Washer with the Honda 390X engine! At 4 GPM & 4000 PSI, this pressure washer has what it takes to get the job done efficiently and