Lochinvar & A.O. Smith 100274785 Valve 30067439-890 and EF33CW188

and EF33CW188

ensuring your blowers aren't fighting excessive static pressure while keeping heat exchangers clear of dust and grease buildup

the 5/8" OD x 12" high-pressure glass

This HVAC pressure switch is factory-calibrated but versatile

reducing physical wear and tear on the actuator

Lochinvar & A.O. Smith 100274785 Valve 30067439-890 and EF33CW188The Lochinvar & A. O. Smith 100274785 Pressure Relief Valve is a critical OEM replacement part engineered for high capacity commercial boilers and water heating systems. Featuring a robust 1 1 2" x 2" connection size and a factory set 50 PSI pressure rating, this valve provides essential overpressure protection for heavy duty hydronic applications. With a massive relief capacity of 4,237,000 BTU hr, it is designed to meet strict ASME safety standards,