When I was on the farm 5 acres at Orchard Hills, Sydney's west, did a demolition in the city, picked up about a dozen empty fire extinguishers, pulled tops off em, 3/4 filled with water then 70 psi of air!
We put em all over the place, believe me, we were grinding and welding on excavators and a few Drotts, trucks etc, but within a radius of 10 metres their were 5 or 6 extinguishers ready to go, such an easy thing to do with something being scrapped, used em often to, pre spray before starting, during and when finished 15 minutes watch and wait, too easy.
