![]() There are two types of rising main: Dry Riser Tall buildings and structures should have a permanently installed rising main which consists of a vertical pipe with brigade connections to BS 5041 at different levels of the building. Fire hose is connected to the valves via a standpipe. Underground hydrant valves to BS 750 are permanently connected to the mains at intervals. the pressurised mains laid under public roads which distribute water to consumers are also used by fire brigades. There are also various outlet connections available and special marine approvals. Some also include a reducing valve to regulate the outlet pressure with a varying inlet pressure which is required in some installations. They are designed to be robust, not freeze in harsh environments, and operate in a fire in accordance with fire testing regulations. The designs of Fire Hydrant valves and Landing valves are very similar irrespective of the place where they are being installed. They are found almost every for example under public roads, in large buildings, in Tunnels, on Chemical plants, onshore and offshore platforms, on board ships etc. A fire hydrant system comprises water supply pipework and valves to which brigades can connect their hose for fire fighting purposes.
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