Lochinvar & A.O. Smith 100171792 Gas Valve

The Lochinvar & A.O. Smith 100171792 is a professional-grade 3/4" 1-stage intermittent pilot gas valve, engineered for high-demand natural gas heating applications. A direct replacement for the legacy VAL2400 gas valve, this component ensures precise fuel regulation in residential and commercial systems including the Lochinvar Energyrite series. As a 24V combination gas control, it integrates a manual valve, dual automatic operators, and a pressure regulator into one compact housing. The step-opening characteristic facilitates a smooth, quiet ignition sequence by providing a reduced initial gas flow before reaching full capacity, which is rated up to 300,000 BTU/hr. Designed for intermittent pilot ignition systems, this valve eliminates the need for a standing pilot, significantly increasing seasonal efficiency. Technical specifications include a standard 3.5" W.C. full rate setting, 1/4" quick-connect terminals, and a straight-through body pattern for streamlined manifold integration. To maintain system integrity, this dual-seat gas valve provides redundant safety shutoff, meeting strict industry codes for modern gas-fired appliances.

• Direct Replacement Logic: Fully replaces the VAL2400, ensuring seamless mechanical and electrical compatibility with existing burner manifolds.
• Optimized Ignition: Features a step-opening gas control that provides controlled fuel delivery to prevent "hard starts" and ignition rumble.
• High-Capacity Throughput: Rated for systems up to 300,000 BTU/hr, making it suitable for larger residential and light commercial water heaters.
• Standardized Fitment: Utilizes a 3/4" x 3/4" NPT inlet/outlet for standard gas valve installation in 24Vac circuits.
• Redundant Safety: Dual automatic operators offer secondary protection, closing the gas supply immediately if the intermittent pilot fails or power is lost.

Common Questions

Is this valve compatible with LP (Propane) systems?
The 100171792 is factory-configured for natural gas. For LP applications, a specific conversion kit must be installed to change the regulator spring and orifice settings to maintain safe manifold pressure.

What should I check if the valve clicks but the burner won't light?
Verify that the 24V signal is reaching the gas control solenoid and ensure the pilot flame is making proper contact with the flame sensor or thermocouple. If the valve is energized but fails to open, the internal diaphragm or mechanical seat may be stuck.

Can I replace a standing pilot valve with this intermittent pilot model?
No, this valve is designed specifically for systems with an electronic intermittent pilot ignition module (like the Honeywell S8610). Converting a standing pilot system to an intermittent pilot requires a complete control system upgrade.

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.