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and Intertherm forced-air systems
Field Readiness: 1/4 inch spade terminals allow for quick rewiring without specialized tools
ensuring optimal exhaust gas flow and structural integrity
the switch provides reliable thermal protection across various Series 1005 to 4005 Raytherm and Xtherm models
Corrosion-Resistant Housing: The 304 stainless steel pressure gauge case protects internal components from moisture and environmental debris
McDonnell & Miller 157S Controller Els PW 29614 and Intertherm forced-air systemsThe McDonnell & Miller 157S is a heavy duty combination low water cut off and pump controller engineered for commercial and industrial steam and hot water boilers. This specific OEM part #173502 features the 157S series head mechanism (part #173003) equipped with a snap acting SPDT switch. Designed for high pressure applications up to 150 psi (10. 5 kg cm), this controller ensures precise liquid level management, acting as a critical failsafe by
