26" WC on rise to ensure precise safety cut-offs for specific residential furnace platforms

5 CFH for natural gas) as dictated by national fuel gas codes

The assembly includes pre-calibrated sensors to provide immediate automated system diagnostics

Durable Construction: Oval run capacitor housing is corrosion-resistant for long-term reliability in outdoor condensers

Utilizing genuine Bard HVAC parts ensures that the mounting footprint and electrical spade connections align perfectly with factory specifications

Weil McLain 511-624-521 Pressure Switch Els PW 17895 26" WC on rise toThe Weil McLain 511 624 521 Pressure Switch is a critical safety component designed for precise differential pressure sensing in high efficiency Weil McLain boilers. This SPST (Single Pole Single Throw) air pressure switch is factory calibrated to a 1. 25" W. C. (Water Column) set point, ensuring the vent blower is maintaining adequate airflow before allowing the ignition sequence to proceed. It features dual 1 4" barb connections for secure pneumatic