Simple high pressure cannon using a 3/4″ QEV as the main valve.
Chamber: 1.25″ galv iron
Barrel: 45mm golf ball barrel or 20mm copper barrel
Main Valve: 3/4″ QEV
Pilot valve: 1/4″ ball valve
Pressure: 0-300PSI
Song: “Black Box In The Ground”
Music used under Creative Commons By Attribution 3.0, credit to Dan-O from DanoSongs.com