1" diameter crankcase

This kit is specifically for the 240RA8 series

Measuring 5/16" diameter by 36" length

Faults are often caused by a failing inducer motor

and heavy-duty relay logic setups

Lochinvar & A.O. Smith 100135290 Burner Assembly 30067439-890 1" diameter crankcaseThe Lochinvar and A. O. Smith 100135290 Burner Assembly is a direct OEM replacement engineered for high efficiency commercial water heaters and boilers. This assembly, cross referenced as BNR3400, features an integrated pressure tap for precise manifold pressure adjustments and diagnostic testing. Designed for optimized gas air mixing, this replacement burner assembly ensures stable flame patterns and consistent thermal output in demanding hydronic