Cummins Drift Truck a la Dum-Dum

[Paul Baldwin]

Other than opening the valve for a couple of days I can't think of any other precautions to take before slicing in with a grinder.

remove valve and Fill it with water then cut it full of water

thats how i cut my last one

That's the safest way of doing it imo, you can always empty it after the initial cuts if using an electric grinder. Some of the valves can put up a fight when trying to undo btw.