achieving up to 10

Precise Calibration: Reliably maintains a 4-8" W

and moisture within the HVAC cabinet

a calibrated manometer should always be used to verify the new trip point

Precision-drilled #43 (

Trane SWT1999 Pressure Switch Els PW 17895 achieving up to 10The Trane SWT1999 is a critical SPDT differential pressure switch engineered for precision monitoring in residential and commercial HVAC applications. As an OEM Trane replacement part, this single pole double throw switch maintains system safety by detecting pressure variances across heat exchangers and inducer assemblies. Operating on a 0. 43 PSI set point, the SWT1999 ensures the inducer motor establishes proper draft before ignition, effectively