This equipment is used for testing cans by compressed air for possible leaks after the body has been   reformed, flanged end one and seamed on.

  The can to be tested is placed on the adjustable support prongs with the flanged or open end against the   rubber pad, and the foot pedal is depressed. This clamps the can and admits air to a predetermined   pressure, while immersing the can in the water tank, Air bubbles observed at this are a clear indication of a   leak.

  Air pressure can be controlled by setting the reduction value at 5, 10 or 15 psi (as required), Machines   fabricated for users operating without central, compressed air supply are supplied without air pressure   reduction values. Instead, these are fitted with a foot pump which can be manually operated to give up 40   psi pressure.