Grohe Universal Non-Return Valve - 45881Grohe Universal Non Return Valve 45881 Non return valve designed to prevent backflow and ensure safe water flow in GROHE faucet and shower systems. Features Universal non return valve for GROHE systems Prevents backflow of water into the supply line Ensures one way water flow for safety and performance Ideal for use in shower systems and hand shower connections Helps maintain system integrity and hygiene Precision engineered for proper fit and