Heavy Duty Brass Ball Valve - Ball valves are valves that use a ball to control the flow of substances from one opening to the next. These valves work by allowing the hole to be open, blocked, or open partially to regulate the flow of gas/liquid. Ball valves are the ideal choice for using with gases as they are able to offer better sealing.,Heavy Duty Brass Ball Valve - Ball valves are valves that use a ball to control the flow of