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The McDonnell & Miller 304100 Head Gasket (Model F-26) is a critical sealing component engineered specifically for high-performance boiler water feeders and low water cut-off systems
If your specific model requires a resistor on the third lead (like the 101334-02)
OEM Precision: Direct York replacement part ensures exact physical fitment on the valve stem
It features durable wire leads and robust encapsulation to resist moisture and contamination in harsh environments
always verify the technical pinout against your specific model's wiring schematic
Peco Controls SP155-009 Thermostat R-407A The McDonnell & Miller 304100The Peco Controls SP155 009 is a high performance Dual SetPoint Commercial Thermostat engineered for precision control in professional HVACR applications. This analog commercial thermostat is a standard setting solution for 2 pipe or 4 pipe fan coil systems, offering reliable SPDT (Single Pole Double Throw) switching capability. Designed to withstand the rigors of commercial environments, the SP155 009 provides independent heating and cooling