Lochinvar & A.O. Smith 100208389 Pressure Switch 322056-301 The Carrier 00501143 is the

The Carrier 00501143 is the industry standard for 5-inch diameter motor housings where a 1-inch thick isolator is required

The Carrier P251-0083H Head Pressure Control is a critical low ambient controller designed to maintain optimal system performance when outdoor temperatures drop below standard operating conditions

The Allanson 1112-F includes a BX connector to facilitate a secure connection to standard armored cable or flexible conduit

featuring a screw-on cover type that simplifies maintenance access while remaining secure against casual interference

Optimized Combustion: The factory-set #27 orifice provides precise fuel metering to ensure clean ignition and consistent thermal transfer

Lochinvar & A.O. Smith 100208389 Pressure Switch 322056-301 The Carrier 00501143 is theThe Lochinvar & A. O. Smith 100208389 is a critical safety component designed specifically for monitoring natural gas pressure in high performance heating systems. As a genuine OEM replacement pressure switch calibrated at 4. 1" WC, it serves as the primary safeguard to prevent ignition or sustained operation during low pressure scenarios. This part is a direct replacement for the obsolete PRS2004 and PRS2004K, ensuring seamless integration into