When your hot water tank won’t deliver or you’re replacing an aging gas valve, choosing the right valve is essential for safety, efficiency, and reliability. The following five products are suited for homeowners and professionals seeking dependable gas control valves and thermostats for natural gas water heaters. This guide explains who each option is best for and why it was selected, with practical notes to help you compare at a glance.
Summary table of selected products:
- Reliance Water Heater Gas Control Valve WT8840B (Resideo) – Best for traditional tank setups requiring compatible control components.
- Reliance Water Heater Natural Gas Control Valve 100112336 – Best for compatibility with major brands; professional installation recommended.
- WT8840B1000 Upgraded Gas Valve (ClimaTek) – Best for a direct replacement aftermarket upgrade.
- WV8840B1158 OEM Upgraded Gas Valve (ClimaTek) – Best for OEM-style replacement with updated design.
- 110-326 Thermostat with Shank and Thermocouple – Best for integrated thermostat and valve replacement with included thermocouple.
Reliance Water Heater Gas Control Valve WT8840B (Resideo)
This valve is a standard gas control unit designed for typical residential water heaters. It is labeled with a temperature rating suitable for ambient conditions from 0°C to 60°C. It is best for homeowners updating a familiar setup or technicians replacing an existing WT8840B-style valve with a compatible cavity.
Who it’s best for: Homeowners or service professionals who currently use a WT8840B-style valve and want a straightforward replacement with familiar form and fit. Why selected: It directly aligns with common gas valve configurations in older Reliance/Honeywell-based systems.
Caution: Verify cavity compatibility before purchase to ensure the 1″ size and mounting match your unit.
Reliance Natural Gas Control Valve 100112336
This thermostat-compatible gas control valve is designed for use with a range of major water heater brands, including A.O. Smith, Reliance, State, and American-branded heaters. Note: professional installation is advised, as improper installation may affect warranty coverage.
Who it’s best for: Installers seeking a versatile valve that fits multiple popular brands. Why selected: Broad compatibility makes it a practical choice for multi-brand service calls.
Caution: Homeowner installation could void warranties; professional installation is recommended.
WT8840B1000 Upgraded Gas Valve (ClimaTek)
This is a brand-new upgraded gas valve designed as a direct replacement for part WT8840B1000. It emphasizes high build quality and durability, aligning with ClimaTek’s replacement-part standards.
Who it’s best for: Technicians orDIYers needing a reliable direct-replacement valve with modern construction. Why selected: Direct compatibility with a known replacement part minimizes fit issues.
Caution: Ensure model compatibility with your tank’s 1″ insulation and cavity before ordering.
WV8840B1158 OEM Upgraded Gas Valve (ClimaTek)
This item is described as an OEM-upgraded valve designed to replace Honeywell part WV8840B1158. It positions itself as a sturdy, long-lasting replacement with updated internal design for reliability.
Who it’s best for: Professionals seeking an OEM-style replacement with updated internals for better longevity. Why selected: It provides an OEM-equivalent option that can ease replacement in compatible models.
Caution: Check the exact cavity and inlet/outlet sizes to avoid fit issues in non-standard tanks.
110-326 Thermostat with 1-3/8″ Shank
This thermostat valve combination comes with a 1-3/8″ shank and includes a replacement thermocouple. It supports natural gas water heater applications with a 1/2″ inlet and outlet sizing. The included thermocouple may not fit every model, but it does not affect valve usage in compatible systems.
Who it’s best for: Installers seeking an all-in-one thermostat-and-valve option with a thermocouple included. Why selected: Integrates valve and sensing components in a single purchase for convenience.
Conclusion for this option: Choose this if your system benefits from an integrated thermostat setup and you confirm the shank size fits your burner assembly.
Buying Guide: Key Purchase Considerations
- Valve compatibility: Check your water heater’s model and cavity size to ensure the valve matches in inlet/outlet and mounting.
- Brand and OEM feel: OEM-style or direct-replacement parts can reduce installation issues and improve fit for certain tanks.
- Professional installation: Some valves require professional setup to maintain warranties and ensure safe operation.
- Thermostat integration: If your system uses a separate thermostat, consider a valve with compatible control options or an integrated thermostat unit.
- Material quality and durability: Look for replacements designed to withstand typical gas-service temperatures and corrosion environments.
- Availability of spare parts: Consider brands that supply replacement seats, diaphragms, and seals for future maintenance.
Frequently Asked Questions
- Q: Do I need a professional to install a gas valve for a water heater?
A: Yes, professional installation is often advised to ensure safety, proper venting, and warranty compliance. - Q: Can I use any valve with any water heater?
A: No, valve sizing, cavity compatibility, and inlet/outlet threads must match your unit’s specifications. - Q: What does “OEM upgraded” mean in valve replacements?
A: It indicates an aftermarket part designed to closely match or improve upon the original manufacturer’s design for compatibility and longevity. - Q: Are thermostats and valves sold separately interchangeable?
A: Some systems require integrated units, while others allow separate thermostat and valve components; verify compatibility with your heater model. - Q: What maintenance is needed for gas valves on water heaters?
A: Regular inspection for leaks, proper venting, and keeping the surrounding area clear are typical maintenance steps; consult a professional for service intervals. - Q: How do I know which valve to choose for my heater?
A: Match the valve part number and cavity size to your heater’s model, and consider whether you need OEM replacement parts or a versatile, brand-spanning option.