Is the 396222/U the same as the 396222

though a dedicated outdoor air sensor is usually preferred for solar shielding

It is factory-set to discharge at a 150 PSI pressure rating or a maximum temperature of 210 degrees Fahrenheit

this 3/8 inch flare shut off valve provides the durability required for heavy-duty commercial service applications

Failures typically stem from a ruptured internal diaphragm

Raypak 011760F Air Switch Els PW 17895 Is the 396222/U the sameThe Raypak 011760F is a critical safety component engineered for precise airflow monitoring in high efficiency heating systems. This Vent Air Switch 2. 50" WC is designed to verify proper drafting and ventilation before allowing the combustion cycle to proceed. Calibrated at a fixed 2. 50 inches water column set point, this diaphragm actuated switch protects the heat exchanger from soot buildup and prevents hazardous flue gas leakage and backdrafting.