Prevost Piping Kit for CR Spotless Wall Mounted SystemDescription If youre like me and want to use deionized water for rinsing your car(s), this is what you want. Using DI water dries quickly, prevents water spots, and is much more efficient than tap water. I've been using this setup for deionized water along with a ton of you, and we've proven now that this setup is legit. This took a bunch of ordering and reordering and lots of waiting for parts to come to figure out what we actually need. I will say,