The Rheem AP14339J-1 Gas Control (Thermostat) is designed for natural gas systems, providing precise temperature control in gas water heaters. This thermostat ensures safe operation by regulating gas flow based on water temperature. Constructed with high-quality materials, it offers durability and reliability. The unit is compatible with various Rheem models, making it an ideal replacement part. With easy installation and compliance with industry standards, this gas control thermostat is essential for maintaining efficient and safe water heating in both residential and commercial applications.