The Lochinvar & A.O. Smith 100093868 Manifold Door Assembly is a replacement component designed for compatible water heaters and boiler systems. It serves as a secure access and sealing assembly around the burner and manifold area, helping maintain proper combustion conditions and safe equipment operation. By enclosing critical components, it supports efficient airflow management and ... https://www.partshnc.com/100093868-lochinvar-ao-smith-manifold-door-assy