Suburban On Demand Water Heater Water Telco Module Board 521492 IN-STOCK Version: Genuine OEM (Suburban Manufacturing) UPC: 755790730346 MPN: 521492 SKU: 521492 Note : this module board is only for newer versions of ST-42 that uses Telco control center (link): 233797 . The older version of the module board is Schuste (link): 521338 which only works with Schuste control center (link): 233678 . These module boards / control centers are not interchangable. Applicable To Model (Telco): ST-42 Updated On: 9/10/26
