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Technicians frequently use this model as a direct replacement in systems requiring precise flame rectification
This valve utilizes a 3/8" inlet and a 1/2" outlet with ODF sweat connections for a standard 3-ton HVAC expansion valve setup
offering a rugged snap-switch mechanism that handles industrial vibrations and thermal cycling
preventing short-cycling and optimizing heat exchange efficiency
000 BTU Polaris models
McDonnell & Miller 354089 Switch Assembly 320788-702 Technicians frequently use this modelThe McDonnell & Miller 354089 Switch Assembly, also designated as the Model SWA 150S M, is a critical replacement component engineered specifically for Series 150S and 157S low water cut offs and pump controllers. For technicians servicing steam boilers, this snap action switch assembly is the standard for maintaining precise liquid level control and ensuring high limit safety. Featuring a manual reset mechanism, this assembly requires professional