The Watts 2065501 Fixed Orifice Assembly is a precision flow control component designed to regulate fluid flow in HVAC and hydronic systems. It works by restricting flow through a calibrated orifice, ensuring consistent pressure and accurate distribution of water or refrigerant for efficient system operation. Commonly used in boilers, hydronic heating systems, heat exchangers, and oth... https://www.partshnc.com/2065501-watts-fixed-orifice-assy