cracks in the alumina ceramic or significant pitting on the rod require immediate replacement to maintain system reliability

ensuring the unit operates within its engineered performance envelope

significantly shortening the pneumatic thermostat installation timeline

This capacitor is rated for 370Vac

McDonnell & Miller 310447 Valve Els PW 17895 cracks in the alumina ceramicThe 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