The Lochinvar & A.O. Smith 100074672 Natural Manifold with Gas Valve Assembly is a replacement gas delivery component designed for compatible gas-fired boilers and water heater HVAC systems. It distributes natural gas evenly to the burners while the integrated gas valve regulates gas flow for safe and efficient combustion. Working together, these components ensure reliable ignition an... https://www.partshnc.com/nat-manifold-wgas-valve-assy-3