Hopewell Stationers | 288 Hoosen Haffejee St, Pietermaritzburg, Pietermaritzburg, 3201

A valve is a device that regulates, directs or controls the flow of a fluid like gasses, liquids and fluidized solids or slurries by opening and closing or partially obstructing various passageways. Valves are technically fittings, but are usually discussed as a separate category. A valve shuts off the flow from the boiler when the water is hot enough.