Pre-rinses are faucets built with a high-pressure spray head intended to effectively rinse dishes prior to being loaded into a dishwasher for additional cleaning.  Pre-rinse spray valves are often used in commercial and institutional kitchens.
VMS stocks a complete line of pre-rinse parts to repair faucets, spray heads, hoses, risers, stems, adapters, wall brackets and more from suppliers like Chicago, BK Resources, Fisher, Encore, T&S Brass, Zurn and others.