Robertshaw 700-456 Gas Valve

The Robertshaw 700-456 is a heavy-duty, line-voltage 120V gas valve designed for high-capacity heating applications, delivering up to 600,000 BTU. This slow opening gas valve is engineered for soft ignition, reducing pilot outage and equipment stress during start-up. Featuring a 1-inch inlet and 3/4-inch outlet with straight-through side outlets, it provides maximum piping flexibility for commercial boilers and large furnaces. This Robertshaw 700 series unit comes factory-calibrated for natural gas at a 3.5" WC regulation point. As a combination control, it integrates a manual gas cock, an automatic pilot safety valve, and a pressure regulator into one compact cast body. The millivolt diaphragm solenoid design ensures reliable flow control in demanding environments, operating within an ambient temperature range of -40°F to 175°F. For technicians performing 700-456 installation, the unit includes an inlet filtered screen to protect the internal seat from debris and is multi-positional, enabling mounting in any orientation except upside down.

• Soft Ignition: The slow-opening characteristic prevents hard starts and flame rollout, extending the life of the heat exchanger.
• High Capacity Output: Rated for up to 600,000 BTU, making it suitable for large-scale residential and commercial 120VAC systems.
• Installation Versatility: Straight-through design with FPT side outlets accommodates complex piping configurations in tight mechanical rooms.
• Field Protection: Integrated pilot gas filter and inlet screens prevent particulate contamination from fouling the valve seat or orifices.

Can the Robertshaw 700-456 be converted for Propane (LP) use?

Yes, while factory-set for natural gas, this valve can be field-converted using the appropriate Robertshaw regulator conversion kit (typically the 1751-013). Always verify the manifold pressure with a manometer after conversion.

What are the electrical requirements for this specific model?

The 700-456 operates on 120V AC at approximately 0.034 Amps. It is designed for line-voltage circuits and is not compatible with standard 24V residential transformers.

Does this valve replace Honeywell V400A series models?

The 700-456 is a common functional cross-reference for several Honeywell V400A valves, including the V400A1095 and V400A5005. Professional verification of BTU capacity and port size is required before swapping.

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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.