“It comes out through a small pipe located just inside the gas nozzle.” And pressure has built up in the tank; that pressure is released as the air escapes. McKenzie compares it to holding ...

The laminar nozzle shown in the picture above is built with 800 drinking straws all placed in parallel inside a 4″ PVC pipe. The water input is a 3/4″ garden hose adapter, perpendicular to ...