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This module is specifically for electronic spark-to-pilot or direct spark ignition systems
Manufactured from high-grade 316 stainless steel
For high-demand condenser replacements
While the nominal size is 20"x26"x5"
McDonnell & Miller 157S-A Controller R-22 This module is specifically forThe McDonnell & Miller 157S A (Part Number 173702) is a heavy duty combination low water cut off and pump controller designed specifically for commercial and industrial steam boiler applications. Featuring a snap acting SPDT switch, this unit ensures precise control over water levels and reliable burner cutout during low water conditions. The 157S A model includes alternate tappings, providing versatile installation options for equalizing pipes and
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