Lochinvar & A.O. Smith 100208060 Insulation Els PW 17895 Direct Compatibility: Specifically engineered for
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Lochinvar & A.O. Smith 100208060 Insulation Els PW 17895 Direct Compatibility: Specifically engineered for Direct Compatibility: Specifically engineered for the Johnson Controls T 4000 series pneumatic thermostats What is the primary difference between the 8201 032 and the 8201 032BX