While it is a universal service thermostat

The Reznor 195645 is designed for systems where the blades spin counterclockwise from this perspective

The ZG-DC1 is specifically sized for 3

While the 210 series shares a design philosophy

this thermal link interrupts the electrical circuit to prevent component failure or hazardous operating conditions

Hydrolevel FOEM-3 Fitting Tee 30067439-890 While it is a universalThe Hydrolevel FOEM 3 Fitting Tee (Part Number 45 305) is a specialized cast iron manifold fitting designed for integrating probes into hydronic or steam systems. Featuring a configuration of 1 1 4" x 1 1 4" x 3 4", this heavy duty boiler manifold tee provides a stable mounting point for water level controls or temperature sensors without restricting fluid flow. Rated for a maximum pressure of 160 PSI, the FOEM 3 is a standard choice for contractors