Ready Built Complete Pressure Washing Trailer. Time to start or grow your Business this rig is for you. Tow Pro Trailer Super Skid Pro VBelt Gas 20 Honda/General 5.5@3500 is the perfect trailer for your Pressure washing needs. With a powerful 5.5HP engine and 3500PSI and 5.5 GPM of hot waster is all you need to maximize earning potential and or get into the commercial washing industry.