This is the 4th turbo torch I own, on average I have to replace it every 3 years because the valve won't close fully, the flame stays on or the propane is leaking. Maybe the inner oil seal needs to be replaced, I didn't disassemble it. Otherwise it's a great burner! I mainly use it for soldering copper fittings, it generates a lot of heat in a short time, no other torch can compare. . Unfortunately it doesn't last long and that's the only reason I give it 3 stars.