Hoffman Specialty 401485 Water Vent L99H008 these valves are factory-set and

these valves are factory-set and sealed to maintain their ASME certification

Wide Media Compatibility: Certified for use with air

clicking without ignition

Easy Installation: Mounts directly within the motor wiring box for a clean

Hoffman Specialty 401485 Water Vent L99H008 these valves are factory-set andThe 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