The hub allows for secure mounting directly to an electrical knockout

For contractors upgrading older systems

As a primary safety interface

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

Weil McLain 511-624-521 Pressure Switch Els PW 17895 The hub allows for secureThe 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