The Resideo VCZBB1100 2-way FEM NPT VC valve assembly is a compact, reliable control valve designed for regulating water flow in HVAC systems. It operates by opening or closing in response to signals from a compatible actuator, ensuring precise temperature control. Commonly used in fan coil units, air handling units, and hydronic heating or cooling systems, it supports efficient fluid management. Its durable construction, easy installation, and consistent performance help improve system efficiency, reduce energy consumption, and maintain optimal indoor comfort in residential and commercial applications.