The Rheem Water Control Valve, part number RTG20239BT, is a vital component for Rheem tankless gas water heater systems. This valve regulates water flow within the unit, ensuring precise control over temperature and volume. Engineered for durability and efficiency, it features precise mechanisms for consistent performance. Specifically designed for Rheem units, this water control valve guarantees optimal functionality, providing reliable and efficient hot water supply for both residential and commercial applications.