Abstract: A valve coupler for delivering air into a propane tank for converting a propane tank to a portable pressurized air tank. The device includes a tubular member having a first end, a second end and a peripheral wall. The tubular member has an elongated hole extending therethrough. The tubular member has a first portion, a second portion and a middle portion. The first portion abuts the first end and defines a male coupler having a threaded outer surface. The hole in the second portion has a threaded inner wall and defines a female coupler. The peripheral wall of the middle portion has a first aperture therein extending into the hole. The first aperture is threaded. The male coupler may be coupled to a propane tank valve. A valve is removably positioned in and threadably coupled to the first aperture for delivering air into the propane tank.