The PAC 6kg pressure regulator is a valve that automatically cuts off the flow of a liquid or gas at a certain pressure. Regulators are used to allow high-pressure fluid supply lines or tanks to be reduced to safe and/or usable pressures for various applications and for this instance its for the 6kg mecko gas cylinder. The PAC 6kg regulator is mainly used to allow the 6kg mecko gas cylinder to be compatible with your standing cooker or tabletop cooker.