What is the maximum back pressure for the Kunkle Figure 20 series

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This OEM replacement part is essential for technicians tasked with restoring the reliable dry-fire protection required in hydronic heating systems

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Bard HVAC 9043-311 Pressure Switch Refrigerant What is the maximum backThe Bard HVAC 9043 311 Pressure Switch is a critical safety component designed for precise monitoring of combustion air and static pressure in compatible Bard wall mount units and forced air systems. This SPST pressure switch is factory calibrated to a 0. 52" WC set point, ensuring the inducer motor or blower assembly maintains correct pneumatic conditions before allowing the ignition sequence to proceed. It features a standard 1 4" barbed connection