Experienced contractors know that reliability in the field depends on using exact-spec components

this kit restores original 18

Its robust construction resists mechanical vibration

ensure the valve is equipped with a watertight NEMA 4 or 4X "RedHat II" solenoid enclosure to prevent moisture ingress

Lochinvar & A.O. Smith 100163255 Kit R-410A Experienced contractors know that reliabilityThe Lochinvar & A. O. Smith 100163255 Air Inlet Kit is a critical OEM component designed to provide regulated, clean combustion air to high efficiency residential and commercial heating systems. Engineered specifically for compatibility with Lochinvar Knight and A. O. Smith boiler and water heater models, including the KB 500 and AW 501 series, this kit ensures the burner receives the precise oxygen volume required for optimal stoichiometric