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When replacing the top assembly
25 HP Pump w/ OmniX W3VSP23420 Compatibility is based on Hayward parts documentation and available OEM records
All wheels are adjustable to increase or decrease the vacuum velocity as desired
the pump can receive and respond to external control signals — enabling speed scheduling
The Unicel C-4320 (4-5/8" OD × 11-7/8" L) is precision-engineered as a direct replacement for both — minor dimensional variations are normal for aftermarket cartridges and do not affect fit or performance within the filter housing
Pentair Thermal Regulator | MasterTemp | 474989 C7483 When replacing the top assemblyThe Pentair Thermal Regulator (474989) is the OEM replacement thermal regulator for the Pentair MasterTemp 125 pool heater. IMPORTANT: HEATER COMPONENTS PROFESSIONAL SERVICE REQUIRED Gas and electrical heater components must be serviced by a licensed pool professional or qualified HVAC technician. Do not attempt to service gas or high voltage components without proper certification. The thermal regulator maintains the MasterTemp 125's operating
