McDonnell & Miller 310447 Valve 30067439-890 ensuring a tight tolerance connection

ensuring a tight tolerance connection that prevents mechanical hysteresis

This component is compatible with all Sure-Flex Plus sleeves except Hytrel

making them 100% interchangeable

this electric heat sequencer prevents simultaneous high-amperage draws that lead to tripped breakers by staggering the activation of auxiliary heat strips and fan circuits

Reliable Switching: Built to handle the high-amperage startup current of furnace blower motors

McDonnell & Miller 310447 Valve 30067439-890 ensuring a tight tolerance connectionThe McDonnell & Miller 310447, specifically the Model 14 B Blow Down Valve, is a high performance full port ball valve engineered for critical maintenance of hydronic heating systems. Designed as a direct replacement for McDonnell & Miller Series 47, 67, and 70B boiler controls, this 14 B valve facilitates the essential "blow down" procedure required to flush sediment and ensure the reliability of low water cut off mechanisms. Featuring a 3 4" NPT