Grohe Universal Non-Return Valve - 08567Grohe Universal Non Return Valve 08567 Universal non return valve designed to help prevent backflow in compatible GROHE plumbing and shower applications. Features Universal non return valve for compatible GROHE systems Helps prevent water backflow for reliable plumbing performance Designed for use in shower and hand shower applications Durable construction for long lasting reliability Precision engineered for secure fit and dependable operation Ideal