Swimables Air Flow Switch For Pentair MasterTemp And Max-E-Therm Heaters | 42001-0061S | SW-41-061 Gas valve for Jandy JXI Critical Pressure Monitoring: Monitors and

Critical Pressure Monitoring: Monitors and maintains the correct water pressure within the heating system

Length: 14"

is designed specifically for pool and spa gas-fired heater atmospheric models 268A and 408A

Critical Safety Component: Designed to protect your heating system from overheating by detecting excessive temperatures

Swimables Air Flow Switch For Pentair MasterTemp And Max-E-Therm Heaters | 42001-0061S | SW-41-061 Gas valve for Jandy JXI Critical Pressure Monitoring: Monitors andThe Swimables air flow switch (AFS), which senses the pressure drop across the air metering orifice. The air flow switch (AFS) senses the pressure drop across the air metering orifice. As soon as there is sufficient air flow, the AFS closes, closing the circuit to the hot surface igniter (HSI), which ignites the fuel mixture. On a call for heat, the blower and HSI are energized. In about 20 seconds, the gas valve opens and ignition occurs. The HSI