The Rheem AP12658C Low NOx Orifice is designed for 3-hole inshot applications in gas water heaters. This orifice reduces nitrogen oxide emissions, promoting environmental compliance and efficiency. Constructed from high-quality materials, it ensures durability and reliable performance under varying conditions. The orifice is compatible with various Rheem models, making it an essential component for maintaining optimal operation. Upgrade your water heating system with this low NOx orifice to enhance efficiency and meet regulatory standards.