I have a kegco co2 regulator purchased in Nov 2015 that i use to carbonate kegs and bottle with a beergun. Today was pretty challenging. I released the pressure on the keg and tried to reduce the pressure at the regulator. I could bring it down to 10 psi but any lower resulted in no co2 pressure at the beer gun. A slight, like less than 15 degree turn of the regulator put it back at 10 psi. It will go higher than that but not lower. Surely a regulator less than two years old isn't shot. My oxy-acetylene regulators are older than I am and theyre still going strong.