The BX173 is a notched (cogged) belt

secure electrical connections during field replacement

ensure you verify the temperature rating on the existing switch to maintain the factory-specified safety parameters of the HVAC burner assembly

This 1/2 inch sweat connection valve features a 2

Resideo ZD16X14TZ Damper Els PW 29614 The BX173 is a notchedThe Resideo ZD16X14TZ is a professional grade parallel blade zone damper designed for demanding forced air zoning applications. This 16" wide by 14" high rectangular damper utilizes a 24Vac power closed spring return open configuration, ensuring fail safe ventilation should power be lost. The integrated synchronous motor is mounted on the 14" side, providing high torque operation to move the parallel blades efficiently against static pressure.