Patent ID: 6890126

Claim:
In an irrigation system which includes a mixer/injector adapted to receive a supply stream of pressurized water, inject air into it, and expel a mixed stream of said water infused with micro bubbles of gas suspended therein, a tubular header receiving said mixed stream, a plurality of tubular branches extending from said header, said branches including spaced-apart emitters for limited flow of said mixed stream from their respective branch, the entire system extending from said mixer/injector to said emitters being intended to be maintained under positive, above atmospheric pressure, whereby said mixed steam of water and air is discharged from said emitters, the improvement comprising: said header having a region above a water/gas interface into which air, which may have separated from the mixed stream, will collect, and an air bleed from said region operative to bleed said separated air from the header while retaining said mixed stream under said pressure.