Does this include the manifold

this switch prevents operation during flue blockage or draft inducer failure

It features a 1/2" MNPT male union inlet and a 1/2" FNPT female outlet

Project Benefits OEM Compatibility: Exact drop-in replacement for York

which allows for a seamless drop-in installation without housing modifications

Lochinvar & A.O. Smith 100112540 Burner Assembly 320074-702 Does this include the manifoldThe Lochinvar & A. O. Smith 100112540 Burner Assembly is a critical OEM replacement part engineered for high efficiency natural gas water heaters and commercial boilers. This 18 inch burner assembly features a precision drilled #32 orifice, ensuring the correct stoichiometric ratio for stable combustion and optimal thermal output. As a genuine final burner assembly kit, it eliminates the calibration issues often found with universal aftermarket