Camco 23402 RV Water Backflow Preventer Valve - Prevent Contamination for Safe Drinking Water | Ideal for RVs, Campers & Outdoor Adventures

I had to add a five star rating to offset the one star rating for having lead content noted in a previous reviewer. California requires a label on everything that contains the most minute amounts of lead. If you wouldn't use this product because of lead then you must not use any electrical extension cords. Virtually every extension cord sold today contains minute levels of lead and because of California's extreme consumer protection laws it must be labeled as such. This product rocks and work's as advertised if you live in the real world outside of California.