Key Benefits 5

The base of the leg features a threaded design that can be turned manually to extend or retract the height between 4 and 5 inches

Is this unit suitable for horizontal or vertical installation

preventing unwanted overfilling

facilitating the essential time delay relay function that prevents cold air discharge and protects the heat exchanger from thermal stress

Hoffman Specialty 401485 Water Vent 320074-702 Key Benefits 5The Hoffman Specialty 401485, or Model 78 Water Main Vent Valve, is a high capacity automatic air vent designed for efficient air elimination in hydronic heating and cooling systems. Engineered for closed loop hydronic systems, this vent features a 3 4" NPT connection and is built to withstand a maximum pressure of 150 PSI. Its primary function is to purge air from water mains and large distribution lines, preventing air bound system issues that lead