and ME series units

technicians can dial in exact setpoints to prevent short-cycling and maintain consistent product integrity

Professional installation is required to confirm the differential pressure matches system specifications and to prevent ignition failure codes or short cycling

F temperature range with an automatic reset

ensuring longevity in demanding hydronic applications

Lochinvar & A.O. Smith 100208442 Relief Valve 30067439-890 and ME series unitsThe Lochinvar & A. O. Smith 100208442 Relief Valve is a critical safety component designed for high performance boiler pressure management. Engineered to trigger at 50 PSI, this valve provides essential overpressure protection for both residential and commercial hydronic heating systems. Within the trade, the 100208442 is identical to RLV2001 and serves as a direct OEM replacement relief valve for several high capacity units, including the Lochinvar