000 hours of operational life within a temperature range of -40°C to +70°C

this part may be listed as replaces York 800042

Accurate Pressure Control: Fixed set at

though it can be replaced by a 440V equivalent if necessary

McDonnell & Miller 250-3/4-15 Valve Els PW 17895 000 hours of operational lifeThe McDonnell & Miller 250 3 4 15 is a high performance 3 4" NPT Pressure Relief Valve engineered for critical over pressure protection in hydronic heating systems and storage tanks. Featuring a robust bronze body and seat, this valve is factory set at 15 PSI with a substantial thermal discharge capacity of 515,000 BTU hr. Designed to meet ASME Section IV code requirements for heating boilers, it utilizes an EPDM rubber diaphragm and seat disc to