Pro-Chem Soft Wash Spray Systems are low pressure chemical applicators designed for cleaning roofs, building exteriors, driveways, screen enclosures, wood decks, fences, vinyl siding or any softer surfaces to remove bacteria, molds, mildews, moss, fungus and algae when pressure washing is not feasible. “Totally Self Contained” 100 or 200 gallon tank feed systems with available pressures of 150 or 300 PSI and flow rates of 6 or 10 GPM featuring Honda gasoline engines and gear reduced Comet or UDOR diaphragm pumps. All skid frames are constructed of aircraft grade aluminum which is chemical resistant and rustproof.