A high pressure cartridge inflator has a body including an air inlet port connectible to a high pressure cartridge, an air outlet port connectible to a valve of an object to be inflated, an air discharge port, and defining a first channel extending from the air let port to the air outlet port and a second channel extending from the first channel to the air discharge port. A pressure indicator is disposed within the body and is fluidly connected to the first and second channels. A safety device is disposed in the second channel and is configured to selectively prevent and allow high pressure air in the high pressure cartridge to flow out of the body through the air discharge port.