Automatic Air Release Vent size:1/2" material:brass body it is male thread,we can produce based on ... Automatic Air Release Ventsize:1/2" 3/4" 1"material:brass bodyit is male thread,we can produce based on your ... to +110° 3:working pressure:1.6Mpa Performance:Adopting good forged brass,the working temperature and pressure range is wideUsing O ring ...