Always cross-reference the model number on the unit's data plate

Featuring a 1/4" SAE flare equalizer and a 10 ft capillary tube

a hard start kit (such as a 5-2-1) is recommended if the unit is operating in a system with non-balanced pressures or high ambient temperatures

ensuring full technical alignment with original equipment specifications

ensure the 24VAC connection is stable before diagnosing a mechanical valve failure

Lochinvar & A.O. Smith 100265707 Burner Assembly 320788-704 Always cross-reference the model numberWhen you're dealing with a natural gas water heater that isn't maintaining consistent flame or efficient heat transfer, the Lochinvar & A. O. Smith 100265707 Burner Assembly is the exact OEM solution required for field restoration. This FBA N3 G40S40 NAT AL EXT assembly kit is specifically engineered for 18 inch diameter tanks, providing a precise fit for G40S40 models across the Lochinvar, A. O. Smith, State, and American Water Heater catalogs. As an