my son and son in law are firemen - they have both been after me to ADD these to the 6 dry chemical extinguishers we already have. even though we are very rural, I'd been resisting - resisting UNTIL they had me watch a video showing how quickly a room can go up. I bought FIVE of them and I am happy I did. also - the contents of DRY CHEMICAL EXTINGUISHERS ARE EXTREMELY CORROSIVE - these are water and will result in much less damage (assuming you put out the fire) they come with the standard Schrader air valves - so you DO NOT need the fill adapter ( P/N Amerex 00155 pressure valve and cap assembly) to fill it regardless of what vendors may tell you.