Robertshaw 720-406 Gas Valve

The Robertshaw 720-406 is a heavy-duty, dual-operator combination gas valve designed for versatility in high-capacity heating applications. Featuring a 3/4-inch NPT inlet and outlet, this 24V gas valve provides a high-flow capacity of up to 450,000 BTU, making it a standard replacement for large commercial boilers and furnaces. This intermittent pilot gas valve is engineered with a straight-through body configuration and includes a 1/4-inch pilot gas connection. It is factory-set for natural gas (3.5" W.C. regulator) but includes a LP conversion kit for field adjustment. This multi-position valve can be mounted in any orientation (except upside down) to accommodate tight service manifolds. For technicians performing a HVAC gas valve replacement, the 720 series ensures reliable millivolt or 24V ignition control with high-ambient temperature ratings, maintaining consistent manifold pressure even under heavy demand cycles found in commercial gas heating systems.

• High-Flow Capacity: Rated for up to 450,000 BTU to support large-scale commercial and industrial heating appliances.
• Dual-Fuel Compatibility: Shipped as natural gas with an included LP gas conversion kit for field flexibility.
• Universal Mounting: Designed for multi-position installation to simplify gas valve troubleshooting and replacement in compact cabinets.
• Internal Filtration: Built-in screens protect the valve operator and pilot orifice from debris in the gas line.
• Standardized Wiring: Features 3/16-inch terminals located on top of the valve for easy integration with standard furnace control boards.

Is the Robertshaw 720-406 compatible with standing pilot systems?
No, the 720-406 is specifically designed for intermittent pilot ignition (IPI) and direct spark applications requiring a 24V AC power source.

Does this valve include a regulator adjustment for propane?
Yes, it includes a conversion spring and plug to change the gas valve manifold pressure from the standard 3.5" W.C. (NAT) to 10.0" W.C. (LP).

Can I use this valve on a smaller 1/2-inch residential furnace?
While technically possible with reducers, this high-capacity valve is optimized for 3/4-inch piping and high-BTU loads; verify your appliance's gas valve crossover specifications before installing.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.