Hello again Irving saw this on another site thought it might be of intrest to you http://mikesworkshop.weebly.com/propane-burner.html
cheers Tom...
P.S. I've made a couple of wood burning stoves out of gas canisters.
cut the first one with a stihl saw after leaving it for 2 weeks upside down with valve fully open thinking that propane being heavier than air would all be gone.found out it wasn't when the blade cut into inside,blowing the canister half way up the workshop in a fiery rage!!! breaking the disc on the saw and firing it in all directions..
since then I have used the same method as yourself leaving it upright with garden hose running slowly for a day (no water shortage in scotland:naughty:)have had no problems since
SO BE CAREFULL PLEASE EVERYONE!!!!!
Tom...