Amtrol 700-30 Float Type Air Vent 1/8" MPS 150 PSI Replaces 690 & 732

The Amtrol 700-30 1/8" MPS Float Type Air Vent 150 PSI is an automatic air elimination component used in hydronic system to release trapped non-condensable gases from piping loops in HVAC systems. It is installed at high points in heating or cooling circuits where air accumulation can affect circulation and efficiency. The internal float mechanism opens and closes the vent port in response to air or fluid presence, allowing controlled discharge while sealing under liquid conditions. Within closed-loop assemblies, it supports stable flow balance, reduces air binding in lines, and helps maintain consistent system performance during continuous operation.