Best Propane Water Heater Thermostats and Valves for 2026
Choosing the right propane water heater thermostat or valve can improve efficiency, safety, and reliability for household hot water. This guide highlights five well-regarded options, covering a range of brands, shank sizes, and safety features. Each product is selected for compatibility with liquid propane systems and common residential tank-style heaters. Read on to compare designs, key features, and installation considerations that affect performance and longevity.
| Product | Brand | Key Features |
|---|---|---|
| Reliance Water Heater Company Liquid Propane Gas Valve 100112338 | Reliance | LP gas valve, value for price, manufactured in China |
| ROBERTSHAW 110-262 Propane Water Heater Thermostat | Robertshaw | 1.625″ shank, 9–12″ water connector, US-made |
| Rheem AP13160A Water Heater Thermostat | Rheem | Liquid Propane Gas Control Thermostat |
| Rheem SP14269A Water Heater Thermostat | Rheem | Liquid Propane Gas Control Thermostat |
| 110-326 Gas Water Heater Valve (WUVYFWN) | WUVYFWN | 3.8″ shank, ECO safety shutoff, copper probe, 45,000 BTU |
Reliance LP Gas Valve 100112338
The Reliance valve is designed for liquid propane applications and integrates the standard gas control approach used by many residential heaters. It emphasizes value and broad compatibility with existing propane setups. The component is manufactured for reliability and replaces older valve assemblies in several AO Smith brands. If your unit uses a basic LP gas control valve, this model can be a straightforward fit, with installation guided by standard safety practices.
Key aspects include a straightforward gas valve interface and a focus on essential LP performance. While specifications highlight value and origin, users should confirm shank size, inlet/outlet connections, and compatibility with their specific water heater model. As with all gas controls, proper sealing, vent clearance, and leak testing are essential during installation.
ROBERTSHAW 110-262 Propane Water Heater Thermostat
The Robertshaw 110-262 thermostat features a 1.625-inch shank and a 9- to 12-inch water connector, designed for dependable control in propane-fired heaters. The unit is marketed as manufactured in the United States, which some installers prefer for domestic support and parts availability. This thermostat integrates with standard gas valves to regulate water temperature, and it is suitable for mid- to larger-capacity residential tank-type heaters.
From a performance perspective, the 1625-inch shank size helps accommodate common installation depths, while the water connector range supports typical piping layouts. Security-minded installers should verify electrical compatibility, wiring harness compatibility, and required resistance to temperature fluctuations. Routine testing after installation is recommended to confirm accurate setpoint control and safe valve operation.
Rheem AP13160A Liquid Propane Gas Control Thermostat
The Rheem AP13160A is a liquid propane gas control thermostat intended for propane-fired water heaters. Rheem’s design ethos centers on reliable performance and easy integration with existing Rheem and compatible systems. This thermostat addresses standard temperature control needs, enabling predictable hot water output and protection against overheating when used with the proper valve assembly.
Consider compatibility with your heater model, shank size, and the overall gas control assembly. Installation should follow the manufacturer’s torque specs and leak-testing procedures. For service technicians, availability of replacement parts and compatibility with related Rheem components can influence long-term maintainability.
Rheem SP14269A Liquid Propane Gas Control Thermostat
The Rheem SP14269A thermostat is another propane-focused model in Rheem’s lineup, designed to provide precise temperature regulation for tank-type water heaters. As with other gas controls, compatibility with the existing valve assembly and correct wiring are essential for proper function. The product highlights “Liquid Propane Gas Control Thermostat,” signaling a design optimized for LP systems and Rheem-recommended configurations.
When evaluating this option, installers should verify the heater’s BTU rating, shank size, and whether any ECO safety features are included or required in tandem with the valve. Regular testing of performance and leak detection remains important in ensuring safe operation over time.
110-326 Gas Water Heater Valve (WUVYFWN)
The 110-326 valve and thermostat kit from WUVYFWN represents a complete replacement option with a 3.8″ shank, 2.2″ W.C. pressure, and a 45,000 BTU capacity. The kit includes a copper probe and emphasizes a robust build designed to resist corrosion. An ECO (Energy Cut-Off) system is built in to automatically shut off gas if water temperatures exceed 160°F (71°C), enhancing safety for propane systems.
What to consider when selecting this kit includes compatibility with the heater’s existing pipe sizing, the presence of a 1/2″ inlet/outlet, and the effectiveness of the ECO feature. The package’s complete replacement nature can simplify installation for technicians by reducing the need for separate components, but verify that all included pieces fit your model and mounting arrangement.
Buying Guide: Key Purchase Considerations
- Gas type and compatibility: Ensure the thermostat or valve is designed for propane LP systems and matches your heater’s gas input configuration (BTU rating, inlet/outlet sizes, and shank length).
- Shank size and connection points: Common shank sizes include 1.625″ and 1.375″ to 3.8″ ranges. Confirm the shank length to line up with your heater’s mounting depth and cabinet space.
- Safety features: Look for built-in energy cut-off (ECO) systems, temperature limit protections, and leak-testing compatibility. ECO helps prevent overheating and gas waste.
- Materials and durability: Valve bodies and thermostats with corrosion-resistant metals, such as stainless steel, are preferable in propane environments exposed to moisture and mineral buildup.
- Warranty and support: Domestic manufacturing or availability of local service support can influence maintenance and part availability over time.
- Installation considerations: Some units require professional installation to ensure gas connections are sealed, properly vented, and compliant with local codes. Check for compatibility with brand ecosystems (Rheem, Robertshaw, Reliance) to simplify replacements.
- Replacement ecosystem: If replacing multiple parts, seek complete kits that cover valve, thermostat, and connections to reduce mismatch risk and installation time.
- Performance expectations: Real-world efficiency depends on the entire system, including heat exchanger condition and proper sizing to the household hot water demand.