Programmable Thermostat

The Robertshaw 720-400 is a 24V dual gas valve from the 720 Series, engineered as a comprehensive six-function combination unit for HVAC control systems. This industrial-grade valve integrates a manual shut-off valve, safety shut-off magnet, dual automatic valves, main gas regulator, and pilot adjustment mechanism, making it an all-in-one solution for standing pilot ignition systems in commercial heating applications. Designed for high-capacity operation, the 720-400 handles up to 150,000 BTU/hr, making it suitable for mid to large-sized heating units. The valve features a 1/2in NPT inlet connection and 3/4in NPT outlet, with included reducer bushings (3/4in x 1/2in NPT and 1/2in x 3/8in NPT) to accommodate various piping configurations. Maximum inlet pressure rating of 14in WC (0.5 PSI) ensures safe operation within standard gas line parameters. Electrically rated at 24V AC with 0.5A draw at 50/60 Hz, the 720-400 integrates seamlessly with standard HVAC control systems and thermostats. The combination design eliminates the need for multiple separate components, reducing installation complexity and potential leak points while improving system reliability and maintenance efficiency. This replacement valve is ideal for retrofit applications in commercial and industrial heating systems, boilers, and furnaces requiring dependable pilot ignition control. The robust construction and proven Robertshaw engineering make it a trusted choice for HVAC professionals seeking long-term performance and safety compliance in gas heating applications.