The self-piercing design eliminates the need for drilling

Utilizing a reliable Therm-O-Disc construction

including Armstrong and Ducane

reducing the heat-soak risk to the valve body

it offers a direct fit for numerous American Standard and Trane models

Lennox 80K27 Pressure Switch Els PW 17895 The self-piercing design eliminates theThe Lennox 80K27 Pressure Switch is a critical safety and operational component designed for high performance Lennox HVAC systems. Engineered for precision, this furnace pressure switch features a 0. 34" wc setpoint, ensuring the draft inducer motor is moving exhaust gases safely before the ignition sequence begins. The SPST (Single Pole Single Throw) configuration provides a reliable normally open circuit that closes under proper pneumatic pressure,