Vacuum breaker - The vacuum breaker is a tool to prevent backflow pressure in a plumbing system, which allows air to enter the water system if a siphon attempts to form and allows air to enter the system, breaking the siphon, when the pressure reduces in the upstream UPC Certified - UPC CERTIFIED and Approved for most municipal water codes Easy to Install - Professional salon sink vacuum breaker fits most salon shampoo bowl faucet so that you can purchase this kit to replace old accessories Package includes - Shampoo Bowl Vacuum Breaker equipped with 31" stainless steel water pipe and receiver plate What You Get: 7 pieces of shampoo sink parts, stainless steel pipe and receiver plate for shampoo basin vacuum breaker Easy to Install: Install - Professional salon sink vacuum breaker fits most salon shampoo bowl faucet so that you can purchase this kit to replace old accessories