The Rheem SP20170C Gas Control (Thermostat) and Burner Assembly Retrofit Kit is designed for natural gas water heaters. This comprehensive kit includes all necessary components for a seamless upgrade or replacement, ensuring optimal performance and safety. The gas control features precise temperature regulation, while the burner assembly is engineered for efficient combustion. Constructed from durable materials, this kit meets all relevant safety and efficiency standards, making it suitable for both residential and commercial applications.