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this Weil-McLain boiler part includes a 1/2" NPT immersion well for direct mounting into the heat exchanger or manifold
or failure to open under pressure
the auxiliary SPDT switch is cam-operated and can be adjusted to trigger at various points during the stroke
or significantly uneven baking results caused by a drifting calibration in the thermal bulb
Verify the mechanical action of your valve body before installation
Trane SWT3403 Pressure Switch 326058-758 this Weil-McLain boiler part includesThe Trane SWT3403 is a high performance OEM high pressure switch designed specifically for refrigeration and air conditioning systems where system integrity is non negotiable. Engineered to act as a critical safety cutoff, this manual reset pressure switch (or automatic depending on system configuration) monitors refrigerant pressure to protect the compressor from catastrophic failure. This specific unit is calibrated with a precise operating pressure