The 8 in. Inline 4 units Direct Vent Header Kit SP20908C from RHEEM is designed for efficient venting in multi-unit water heating systems. This kit includes all necessary components for direct venting, ensuring safe and effective exhaust gas removal. Constructed from high-quality materials, it is built to withstand high temperatures and corrosive environments. The 8-inch diameter provides optimal airflow, making it suitable for various RHEEM models. Enhance the safety and efficiency of your water heating system with this essential direct vent header kit.