This Beckett wheel features a standard 1/2 inch bore

the 664435R may be cracked or internally obstructed

Does this module replace the Fenwal or Honeywell versions used in older boilers

it ensures proper CFM delivery across the heat exchanger

Key Benefits: Direct OEM Compatibility: Provides a seamless fit for York HVAC units

Williams 4163 Floorboard 323613-751 This Beckett wheel features aThe Williams 4163 Floorboard is a heavy duty, insulated metal protection plate designed specifically for Williams hearth heaters with 50,000 and 65,000 BTU capacities. As a critical installation component for vented hearth heaters, this floorboard acts as a thermal barrier and structural support, safeguarding finished flooring from the high temperature output and weight of the unit. It is engineered for a precise fit with Williams 5001A and 6501A