The Rheem SP20166A Gas Control Thermostat is designed for natural gas applications, ensuring precise temperature regulation for your water heater. This thermostat features a robust construction that meets industry standards for safety and reliability. With a compact design, it fits seamlessly into various Rheem models, providing efficient control over gas flow. The unit is compatible with standard gas connections and is engineered to operate effectively in residential settings. Its easy installation process makes it a preferred choice for both professionals and DIY enthusiasts.