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While a 3/4" NPT connection requires a seal
the A421ABC-03 utilizes a high-impact thermoplastic NEMA 1 (IP20) enclosure that supports both DIN rail and surface mounting
Integrated Safety: Features built-in circuit breakers for enhanced protection and simplified electrical runs
restoring normal furnace operation without manual intervention
The unit comes with a barbed restrictor tee specifically sized for 1/4" OD polytubing
Lochinvar & A.O. Smith 100173792 Arm Assembly 340155-7024 While a 3/4" NPT connectionThe Lochinvar & A. O. Smith 100173792 Arm Assembly is a critical OEM component designed for high efficiency burner management in commercial and residential gas fired systems. Engineered for precision and thermal stability, this gas air arm assembly ensures the correct orientation and alignment of the burner interface, which is essential for maintaining stoichiometric combustion and maximizing heat transfer. Built to withstand the harsh operating
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