Water Heater Gas Valves
Water heater gas valves are essential components for controlling the gas supply to the pilot light in water heating systems. These valves ensure smooth ignition and steady gas flow, enabling the pilot light to heat the thermocouple and maintain consistent water temperatures. Our range of water heater gas valves is specifically designed for standing pilot applications, making them both easy to install and replace. With advanced features like the Resettable Emergency Temperature Cutoff, these valves help reduce the risk of scalding, lower labor costs, and minimize repair time, ensuring safe and efficient operation for both residential and commercial water heaters.
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Enhance reliability and minimize maintenance calls with a larger pilot flame, which provides more dependable ignition and heat consistency. Jackson Systems & Supply offers a comprehensive selection of water heater gas valves to meet all your heating system needs. Shop our range today for high-quality, durable valves that improve performance and extend the life of your water heater. Our products are engineered for energy efficiency, customer satisfaction, and safety—making us the trusted choice for HVAC professionals and homeowners alike.
Technician-Trusted Picks
Tank Family
Bradford White – Atmospheric (standing pilot, NG, 4″ W.C.)
- 2″ insulation well: WT8840A1500
- 1″ insulation well: WT8840A1000
Bradford White – Ultra Low NOx (ULN)
- ULN replacement: WT8860A1000
A. O. Smith / State – Atmospheric (NG, 5″ W.C.)
- 1″ insulation well: WT8840B1000
Rheem / Ruud – Atmospheric (NG, 4″ W.C.)
- 1.5″ insulation well: WT8840C1000
A. O. Smith – Power-Vented / Intelli-Vent®
- Electronic combo control: White-Rodgers 37E73A-903
(replaces A.O. Smith 184960)
Application / Vintage
Universal Atmospheric Replacements (older tanks)
- White-Rodgers combo control (NG, 1″ shank): 37C73U-170
OEM-Style Integrated Controls (modern tanks)
- Resideo WT88xx series with thermopile power, LED diagnostics, resettable ECO:
- Bradford White: WT8840A1500, WT8840A1000
- A. O. Smith / State: WT8840B1000
- Rheem / Ruud: WT8840C1000
- Bradford White ULN: WT8860A1000
How to Choose a Gas Valve
- Match the Water-Heater Brand/Model (or old valve #). Directly cross-reference part numbers for Bradford White, Rheem, and A. O. Smith models and WV/WT part numbers.
- Confirm Gas Type & Manifold Pressure. Natural-gas versions are typically 4″ or 5″ W.C. For LP/propane use the WT8840C series (10″ W.C.).
- Pick the Insulation/Spud Length. Most series offer 1″ vs 2″ insulation variants. Choose the well length that matches the tank label.
- Venting Style Matters. Use traditional WT88xx controls for atmospheric/standing-pilot units. For power-vented A.O. Smith models, select an Intelli-Vent control.
- Service Features. Look for resettable ECO, LED error codes, and thermopile power to simplify diagnostics and avoid external wiring.
