Features:

Built-In Shut-Off Valve for Servicing without System Shutdown
Built-In Vacuum Breaker
Removable Float/Valve Assembly for Easy Servicing
Safety Drain Connection and Vent Cap with Leakage Guard
Internal Parts Made of Corrosion and Chemical Resistant Materials for Use with Water Systems Containing Propylene Glycol, Mineral Oils or Petroleum Based Oils
Maintains Quiet and Efficient Operation

Specifications:

Manufacturer: Honeywell
Manufacturer Part Number: EA79A1004
Product Type: Air Vent
Inlet Size: 3/4" x 1/2"
Inlet Connection: Male Threaded, Female Threaded
Body Material: Brass
Temperature Rating: 250 Degrees F
Pressure Rating: 150 PSI
Media Handled: Air, Water
Dimensions: 6.55" x 2.35" x 2.05"
Weight: 1.06 lb.
Includes: Built-In Shut-Off Valve, Built-In Vacuum Breaker