The Cold Water Road Tow Bowser Washer – Petrol 500L is a compact and powerful mobile cleaning system designed for professional use in remote or hard-to-reach locations. Fitted with a high-performance petrol engine and a 500-litre water tank, this unit provides complete independence from mains water and power. Fully highway towable, it’s ideal for construction sites, farms, councils, and vehicle cleaning contractors who need a reliable, self-contained cold-water jet wash solution.