some technicians use these in retrofit scenarios

The inclusion of the internal check valve facilitates bi-flow operation

An open circuit (infinite resistance) indicates the element has failed

this 100208494 replacement part provides the necessary hardware reliability to restore DHW priority and space heating functionality

Direct Compatibility: Exact 5-inch diameter and 41

McDonnell & Miller 94-A Pump Controller R-22 some technicians use these inThe McDonnell & Miller 94 A Pump Controller (Part Number 165500) is a heavy duty combination low water cut off and liquid level control engineered specifically for commercial and industrial steam boilers. Rated for a maximum pressure of 250 PSI, this float operated unit provides reliable burner protection and automatic feed pump cycling to maintain consistent water levels regardless of steaming capacity. Unlike standard models, the 94 A features 1 1