while this is a complete assembly

it provides the precise modulation required for hot water

Can this replace a Honeywell VR8300C series valve

and PCH/PCL liquid level control and low water cut-off units

Lochinvar & A.O. Smith 100233609 Gasket 318518-761 while this is a completeThe Lochinvar & A. O. Smith 100233609 Gasket Flapper Valve is a critical OEM replacement component engineered for high efficiency condensing boilers and commercial water heaters, including the Lochinvar Armor X2 and Shield SN126 401 series. As a veteran grade HVAC flapper valve, this part serves as a directional check mechanism within the combustion or venting assembly, preventing hazardous exhaust gas backflow and maintaining proper pressurized seal