Prevost Piping Kit for CR Spotless Rolling SystemDescription Piping Package Ive been using our Prevost Piping Kit for years. I have this built into my Kranzle Custom Install Solution and love it. This piping system is designed to channel deionized water from the water source to the cars paint through a pressure washer hose and a spray gun wand. Using DI (deionized water) dries quickly, prevents water spots, and is much more efficient than tap water. We made this kit specifically for the CR Spotless