The Rheem 6 in. Inline Direct Vent Header Kit includes three units designed for efficient venting in gas appliances. This kit is essential for proper exhaust management, ensuring compliance with safety standards. Each unit is crafted for durability and ease of installation, making it suitable for various applications. The 6 in. diameter allows for optimal airflow, enhancing the performance of your heating system. Ideal for use with Rheem water heaters and other compatible systems, this kit ships directly from the manufacturer.