Grohe Universal 1/2" Inline Vaccum Breaker - 45852Grohe Universal 1 2" Inline Vaccum Breaker 45852 Inline vacuum breaker designed to prevent backflow and protect potable water systems in GROHE installations. Features Universal inline vacuum breaker for GROHE systems Prevents back siphonage and contamination of water supply Designed for 1 2 connections Ensures safe, one way water flow Commonly used in bidet and faucet applications Durable construction for long term reliability Precision engineered for