Provides positive shut-off to eliminate loss of system liquid. An excellent choice for use in systems using ethylene glycol and water.A rugged High Capacity Air Vent designed to purge free air from liquid systems at operating pressure up to 150 psig. The Model 107A Air Vent has cast iron body and bonnet, with stainless steel, brass and EPDM internal components and is suitable for a maximum operating temperature of 250ºF. The Air Vent has a 3/4" NPT inlet and 3/8" NPT outlet.Inlet Size: 3/4"Outlet Size: 3/8"Connection Type: ThreadedThread Type: FemaleMax Temp (F): 250°FMax Pressure (PSI): 150Height: 9-5/8"Width: 4-1/2"Material: Cast IronInternals: Non-FerrousThis replaces Bell & Gossett 107A and 107