Lochinvar & A.O. Smith 100277835 Kit 321894-709 the internal diaphragm ensures that

the internal diaphragm ensures that the combustion circuit remains open until the inducer motor establishes the correct static pressure

Its slender body permits installation with deep-socket wrenches in tight enclosures

the factory-specified replacement for the legacy 89M7601 part number

High Power Capacity: The 70VA rating provides ample headroom for complex multi-stage systems and accessorized air handlers

OEM Recommended: Recognized and recommended by major equipment manufacturers for post-burnout cleanup

Lochinvar & A.O. Smith 100277835 Kit 321894-709 the internal diaphragm ensures thatThe Lochinvar & A. O. Smith 100277835 Kit is a critical Venturi High Modulation assembly designed for precision air to fuel ratio control in high efficiency condensing boilers and water heaters. Engineered for natural gas systems, this 24 mm venturi ensures consistent performance across the full turndown range, or 5: 1 firing rate, by precisely mixing gas and air before delivery to the radial fire burner. This OEM replacement part is essential for