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Pentair Pump and Filter Union

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  • Airflow switch replacement fixes the heating performance of your system

  • Fits perfectly into the Pentair MasterTemp, Pentair MasterTemp 125, and Sta-Rite Max-E-Therm pool and spa heater electrical system

  • Helps sense the pressure drop across the air metering orifice and insure the combustion air blower fan is operating properly

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