the HD44AR134 is the manufacturer-designated updated replacement for the HD44AE131

Field Adjustable Range: Wide 0

This is an automatic reset switch

while the Teflon (PTFE) seal material offers excellent chemical resistance and high-temperature tolerance

Enhanced Safety: High-coverage design prevents accidental injury and protects internal components from external debris

Lochinvar & A.O. Smith 100109816 Pressure Switch Els PW 29614 the HD44AR134 is the manufacturer-designatedThe Lochinvar & A. O. Smith 100109816 Pressure Switch is a critical OEM replacement part engineered for precise atmospheric monitoring in high efficiency commercial water heaters and boilers. Calibrated to a 6. 5" WC (Water Column) set point, this differential pressure switch acts as a safety critical flue prover, ensuring the combustion blower is generating sufficient negative pressure to safely vent exhaust gases. Designed for compatibility with