this kit is designed for specific furnace series such as the TM8

Enhanced Safety: Built-in slotted safety magnet allows for easy connection of an ECO (Energy Cut-Off) switch where required

providing a dependable 24Vac spring return mechanism that ensures the valve returns to its fail-safe position during power loss

High-Capacity Compatibility: Optimized for large-scale commercial heating systems and industrial process equipment

Reduced Maintenance Frequency: High-integrity sealing prevents bolt tension loss and gasket failure

McDonnell & Miller FS7-4S Snap Switch THPU32HP7Y this kit is designed forThe McDonnell & Miller FS7 4S is a heavy duty industrial liquid flow switch engineered for high pressure applications where standard brass units fall short. Featuring a rugged stainless steel body and 120160 part number, this 1 1 4" NPT flow switch is rated for a maximum pressure of 1000 psi and fluid temperatures up to 300F. The single pole, double throw (SPDT) snap switch mechanism provides reliable liquid flow detection for large pipe systems,