Always verify the probe length against the manifold clearance to ensure proper seating within the water column

or differential air pressure

Copper-Fin (CP/CW) units

As a closed-face type limit

This heavy-duty replacement part is the standard for technicians requiring a reliable low-pressure regulator spring replacement

Reznor 197028 Pressure Switch Els PW 17895 Always verify the probe lengthThe Reznor 197028 Pressure Switch is a critical safety component designed for precise draft monitoring in high output unit heaters. Engineered as a genuine OEM replacement part, this high altitude pressure switch features a factory calibrated . 65" WC set point and a Single Pole Single Throw (SPST) configuration. It is specifically utilized in Reznor UDX, UDZ, UBX, and UBZ series heaters (size 125) for installations above 6,000 feet, as well as