Using ultra-high pressure waterjets, self-propelled Ultra Deckblaster quickly blasts away old paint, coatings, grease, and dirt from steel decks and concrete floors without using hazardous chemicals. Operating at pressures to 55,000 psi, portable system uses UHP water supplied by waterjet intensifier pump; hydraulic pressure activates motor spin spray bar assembly and open high-flow water valve supplying fluid to manifolds. Multiple orifices direct water over 18 in.wide cleaning path; operator has total control of rotation speed, drive speed, forward/off/reverse, water and rotation on/off of spray bar.