This direct mount

Beyond thermal fatigue

which is critical for preventing back-siphonage of contaminated water into the potable supply

the Resideo AT140A1018 includes an iridescent mounting plate and feet

How should the probe be positioned for the best accuracy

York S1-024-34562-000 Pressure Switch Els PW 17895 This direct mountThe York S1 024 34562 000 Pressure Switch is a critical OEM replacement part engineered specifically for high efficiency York furnace and air handler applications. This dual pressure switch features a normally open (N O) contact configuration, calibrated with a 1. 05 0. 40 deactivation rating to monitor venting and combustion air pressure accurately. When the S1 024 34562 000 detects a drop in static pressure or an obstruction in the flue, it breaks