this 120V time delay relay (Thermodisc #12S22 305587) regulates the activation of blower motors and fans to prevent rapid cycling

75" WC (Water Column)

effectively cutting power to the heating elements or burners until the system cools to 145°F and automatically resets

As a high-performance HVAC pneumatic control accessory

maintaining the original equipment's safety listing

McDonnell & Miller P-6-SS Probe Rod 30067439-890 this 120V time delay relayThe McDonnell & Miller 179555, model P 6 SS, is a 72 inch liquid level control probe engineered for high precision monitoring in industrial and commercial boiler systems. Constructed from premium 316 stainless steel, this probe rod is designed for high demand environments where corrosion resistance is non negotiable. The full length of the rod is encased in a high grade PTFE coating (Teflon), an essential technical feature that prevents "bridging" or