[TheForge] cutting propane cylinders

[Barking Crow]

When doing the fill it with water and then plasma cut thing on a cylinder,
can you plasma cut below the water level or do you have to cut just above
the water level?    Just curious down here in Tallahassee where I just
welded a 1/2 tee to the top of an old small propane cylinder that I hope to
turn into a portable tank for compressed air when I find the piece to let me
fill the tank, a valve stem set up I assume.

Jeff Valentine