Budget thermostats underperform—but Rheem AP14270G delivers reliability.
When it comes to gas water heater thermostats, choosing the right one is essential for efficiency and safety. The **Rheem AP14270G** boasts precision control, while the **Reliance 100112336** excels in compatibility with various brands. These top picks ensure your water heater operates smoothly.
For those seeking durability, the **Reliance 100112336** features a robust design that withstands high temperatures, making it ideal for demanding environments.
Below, we analyze budget, lifespan, and real-user feedback.


Rheem Gas Control Thermostat, Natural Gas
Rheem AP14270G Gas Control Thermostat: 12.7” x 7.5” x 6.6”, OEM genuine factory authorized part, 2-year warranty.
Benefits
- Controls the flow of gas from the main supply line to the burner efficiently.
 - Maintains water temperature accurately for consistent heating performance.
 - Easy installation for quick replacement of old thermostats.
 
Drawbacks
- No digital display for real-time temperature monitoring.
 - No compatibility with non-Rheem water heaters.
 
The Rheem AP14270G Gas Control Thermostat is a reliable choice for managing gas flow and water temperature in your gas water heater. Its robust design ensures durability, and the OEM designation guarantees compatibility with Rheem models. The thermostat is straightforward to install, making it a practical option for homeowners looking to replace their existing unit without professional assistance.
While it lacks a digital display, the thermostat’s mechanical operation is effective for those who prefer simplicity. However, it is essential to note that it is not compatible with other brands, which may limit options for some users. Overall, this thermostat is a solid investment for those in need of a dependable gas control solution.
A practical pick for homeowners with Rheem water heaters.
To buy this product, click here.
Reliance Gas Control Valve WT8840B 160°F
Reliance Water Heater Gas Control Valve 100112336: 12” long, ABS plastic, 2-year warranty.
Benefits
- Integrated NTC temperature sensor accurately reads water temperature up to 221°F (105°C).
 - Pressure regulator setting at 5.0 in. Wc ensures optimal gas flow.
 - Ambient temperature rating from 0°C to 60°C allows for versatile use.
 - Capacity of 30 ft³/hr to 75 ft³/hr supports various heating needs.
 
Drawbacks
- No dishwasher-safe parts may complicate cleaning.
 
A practical pick for small spaces, the Reliance Water Heater Gas Control Valve is designed for efficiency and reliability. It fits easily in confined areas, making it ideal for residential applications where space is limited. The temperature range of 32°F to 150°F provides flexibility for different heating requirements, while the durable ABS plastic construction ensures longevity. However, potential users should note that the absence of dishwasher-safe components may require more manual cleaning efforts. Overall, this gas control valve is an excellent solution for those needing a compact and effective heating control option.
To buy this product, click here.
Reliance Natural Gas Control Valve 100112336
Reliance Water Heater Natural Gas Control Valve 100112336: 12” long, ABS plastic, 2-year warranty.
Benefits
- Holds 5L without tipping.
 
Drawbacks
- No dishwasher-safe parts.
 
A practical pick for small spaces.
To buy this product, click here.
110-326 Gas Water Heater Valve
110-326 Gas Water Heater Valve: 12” long, ABS plastic, 2-year warranty.
Benefits
- Holds 45,000 BTU flow capacity with a temperature limit of 160°F (71°C) without failing.
 
Drawbacks
- No dishwasher-safe parts; requires manual cleaning.
 
The 110-326 gas water heater valve is built with high-quality materials, ensuring durability and reliability. With an inverted flare pressure regulation of 3.5″ WC, it provides efficient operation for natural gas water heaters. The straightforward design makes installation easy, even for DIY enthusiasts. The thermostat shank length of 1-3/8″ and sensing tube length of 5-1/2″ are well-suited for various setups, making it versatile.
Safety is a priority with this valve, featuring a built-in non-circulating Energy Cut-Off (ECO) system that automatically shuts off the gas if the water temperature exceeds safe levels. This function adds an extra layer of security for users, reducing the risk of overheating.
While the valve is easy to install, it’s important to note that no parts are dishwasher safe, necessitating manual cleaning. However, this minor drawback does not detract from its overall performance and reliability.
A practical pick for small spaces, the 110-326 gas water heater valve is ideal for those looking for a dependable solution for their water heating needs.
To buy this product, click here.
A.O. Smith Gas Control Valve 100262939
AO Smith Gas Control Valve 100262939: 2” cavity, OEM part, compatible with natural gas water heaters.
Benefits
- Ensures precise temperature control for efficient water heating.
 
Drawbacks
- Installation requires professional expertise for optimal performance.
 
This gas control valve is designed specifically for A.O. Smith water heaters, ensuring compatibility and reliability. It features a robust construction that enhances durability, making it a dependable choice for your heating needs.
The valve provides precise temperature regulation, which can lead to improved energy efficiency and lower utility bills. Its OEM status guarantees that you are getting a product that meets the manufacturer’s standards, ensuring optimal performance.
However, it’s important to note that installation may not be straightforward for the average user. Professional installation is recommended to ensure safety and proper functionality, which can add to the overall cost.
This product is ideal for homeowners looking to replace their gas control valve with a high-quality OEM part. It is particularly suited for users who prioritize efficiency and reliability in their water heating systems. A practical pick for those seeking dependable water heating solutions.
To buy this product, click here.
Faq about Gas Water Heater Thermostat:
1: What is a gas water heater thermostat?
A gas water heater thermostat is a device that regulates the temperature of the water in the heater by controlling the gas flow to the burner.
2: How does a gas water heater thermostat work?
The thermostat senses the water temperature and signals the burner to turn on or off, maintaining the desired temperature set by the user.
3: What are common issues with gas water heater thermostats?
Common issues include inaccurate temperature readings, failure to turn on or off, and physical damage to the thermostat components.
4: How can I troubleshoot my gas water heater thermostat?
Check the temperature setting, inspect for gas supply issues, and ensure the thermostat is clean and free of obstructions.
5: When should I replace my gas water heater thermostat?
Replace the thermostat if it fails to maintain the correct temperature or shows signs of damage or malfunction.
6: Can I adjust the temperature on my gas water heater thermostat?
Yes, you can adjust the temperature by turning the dial or using the control panel, depending on the model.
7: Is it safe to repair a gas water heater thermostat myself?
It is advisable to consult a professional for repairs to ensure safety and proper functioning.
Conclusion
Rheem’s Gas Control Thermostat exemplifies reliability and efficiency, ensuring optimal temperature regulation and enhancing energy conservation in household water heating systems. Its intuitive design and robust performance make it a favored choice for homeowners seeking dependable solutions.
Conversely, the Reliance Gas Control Valve WT8840B, with its precision engineering and high-temperature threshold of 160°F, stands out for those prioritizing safety and efficiency. Together, these products represent the pinnacle of innovation in gas water heating technology, catering to diverse consumer needs.





