This thermostatic expansion valve (TXV) is specifically calibrated for R-22 refrigerant

or inconsistent 120VAC supply voltage

65 Psi < 300 Psig

this pilot-operated solenoid valve is designed to manage air

Replacing a pre-purge unit with a NoPP module can lead to safety concerns or improper venting sequences

Lochinvar & A.O. Smith 100208408 Pressure Switch 320735-701 This thermostatic expansion valve (TXV)The Lochinvar & A. O. Smith 100208408 Pressure Switch is a critical safety component designed for high efficiency boilers and water heaters. As a low air pressure switch, its primary function is to monitor the differential pressure within the combustion chamber and venting system. Specifically engineered as an OEM replacement part, the 100208408 ensures that the inducer blower is generating sufficient airflow to safely exhaust flue gases and support