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What is the difference between the 42089 and the Y90AA-4211
000 AFC (Available Fault Current) safety rating and non-PCB oil
5 stem assemblies are technically identical in length
Can I use this for LP and Natural Gas furnaces
this unit minimizes resistance and extends the service life of auxiliary signaling paths
Lochinvar & A.O. Smith 100233264 Bulbwell What is the difference betweenThe Lochinvar 100233264 Bulbwell is a precision engineered immersion well designed for accurate temperature sensing in commercial boilers and water heaters. As a direct OEM replacement part, this component ensures the aquastat sensor or thermostat bulb is properly isolated from the high pressure system fluid while maintaining optimal thermal conductivity. This specific model is functionally identical to Lochinvar TST2301 and TST2301K, providing a
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