Robertshaw 720-055 Gas Valve

The Robertshaw 720-055 is a professional-grade 24V hot surface ignition gas valve engineered for versatile performance in residential central heating, wall heaters, and boilers. This intermittent pilot gas valve features a 1/2" NPT inlet and a 3/8" NPT right angle outlet, providing a compact 3-9/16" swing radius that simplifies installation in tight OEM cabinets. Designed as a direct 7707-326 replacement for Evcon and Coleman units, the 720-055 operates with a 125,000 BTU capacity and includes a convertible pressure regulator. It is factory-set at 3.5" WC for natural gas but includes the necessary internal components for LP conversion at 11.0" WC. The dual automatic valves and 1/4" NEMA terminals ensure a reliable electrical interface at 0.5 Amps, while the integrated inlet filtered screen protects internal components from debris. For technicians managing high-demand service calls, this multi-position valve provides a standardized solution for HSI gas valve installation across multiple heater brands.

Key Benefits

• High Compatibility: Serves as a direct cross-reference for numerous Evcon and Coleman 720 series gas valve models.
• Compact Footprint: The 3-9/16" swing radius allows for right angle gas valve mounting in space-restricted furnace vestibules.
• Field Convertible: Includes a gas valve LP conversion kit for switching between natural gas and liquid propane applications.
• Reliable Ignition: Specifically optimized for hot surface ignition (HSI) systems to ensure consistent burner engagement.
• Flexible Installation: Multi-position mounting capability allows for horizontal, vertical, or angled orientation (excluding upside down).

Common Questions

Can the Robertshaw 720-055 be used with standing pilot systems?
No, this model is designed specifically for intermittent pilot and hot surface ignition systems. For standing pilot applications, a 700 series constant pilot valve is typically required.

Does this valve support high-capacity furnace and boiler loads?
Yes, with a capacity rating up to 125,000 BTU, it is suitable for a wide range of residential furnaces, boilers, and mobile home heating units.

What is the proper procedure for LP conversion on this unit?
The valve includes a conversion kit. Technicians should swap the regulator spring and adjust the pressure to 11.0" WC while monitoring the outlet tap with a manometer.

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.