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While the 1" NPSM thread is a standard size
ensure the fluid temperature does not exceed the seal's rated limits
or glycol applications requiring a spring return stem up fail-safe position
Mixing Tube Housing: Specifically designed for duct sensor placement to ensure accurate sampling of mixed air temperatures
Lochinvar & A.O. Smith 100233301 Switch 326058-755 While the 1" NPSM threadThe Lochinvar & A. O. Smith 100233301 Switch is a critical fixed setting Normally Open (N. O.) air pressure switch designed for negative pressure sensing applications in high efficiency venting systems. Calibrated specifically to 1. 25" WC, this OEM component serves as a primary safety proving switch, ensuring the combustion blower is generating sufficient draft before the ignition sequence initiates. For veteran technicians, this 100233301 pressure
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