Robertshaw 710-503 Gas Valve

The Robertshaw 710-503 Gas Valve is a millivolt (MV) low-capacity gas valve engineered for precision fuel regulation in high-density or confined installations. Designed as a reliable 7000MVRB-5-LC replacement, this 1/2" NPT inlet x 3/8" NPT outlet valve is a staple for residential hearth professionals and light commercial technicians servicing gas fireplaces, wall heaters, and low-BTU appliances. Its Hi-Lo regulator functionality allows for accurate modulation of the pilot and main burner, ensuring consistent performance in high-demand environments. Built with a compact footprint of 3-13/16" H x 4-21/32" L x 1-29/32" W, it facilitates straightforward retrofitting where space is at a premium.

This unit features a thermopile-only ignition system, supporting an electrical rating of 250 mV to 750 mV. The Robertshaw 710 series is factory-configured for natural gas but remains versatile, supporting conversion to LP gas with the appropriate regulator kit. With a 70,000 BTU capacity and an ambient temperature rating of -40°F to 175°F, this valve maintains structural integrity and operation in extreme conditions. The integrated gas cock dial (Off-Pilot-On) and standard NEMA terminals streamline HVAC gas valve installation and diagnostics for seasoned contractors.

Key Performance Benefits

• Compact Low-Profile Design: Optimized for limited-space installs like RV furnaces and zero-clearance fireplaces.
• High-Temperature Resilience: Engineered to operate reliably between -40°F and 175°F.
• Contaminant Protection: Features a built-in inlet filter screen to protect internal components from line debris.
• Flexible Mounting: Multipositional capability allows for installation in any orientation except upside down.
• Safety Compliance: Designed with a manual gas cock and automatic pilot safety, fully RoHS compliant.

Common Technical Questions

Can I use this valve with a thermocouple?
No, the 710-503 is designed for millivolt systems specifically requiring a thermopile (250mV to 750mV) to generate the necessary voltage for the magnetic operator.

Does this valve come with reducer bushings?
This specific model features a 1/2" NPT inlet and a 3/8" NPT outlet. Always verify your manifold piping size; while some variants include bushings, this OEM replacement is typically direct-fit for 710-series fireplace applications.

Is this valve convertible to Propane (LP)?
Yes, while factory-set for natural gas (typically 3.5" W.C.), the 710-503 can be converted for LP use using a Robertshaw 1751 series regulator conversion kit.

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.