Cozy Heaters 84085 Gas Valve MV 3.5" WC is a gas flow control component designed to regulate the delivery of natural gas to heating equipment. It works by opening and closing in response to thermostat and control system signals, maintaining a manifold pressure of 3.5 inches water column for safe and efficient burner operation. This gas valve is commonly used in Cozy wall heaters, furn... https://www.partshnc.com/84085-cozy-heaters-mv-3-5-inch-wc-gas-valve