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DRY RISER SYSTEM
A dry riser is a system of empty pipework installed within buildings. It comprises a two way breeching inlet at ground level and a series of water outlets at appropriate locations throughout a building. The two way breeching inlet enables connection to a fire appliance via a hose for the supply of water.
The system of empty pipework feeds landing valves located throughout the storeys of a building as required. At the highest level of the dry riser an automatic air release valve allows trapped air to escape when water is being pumped into the inlet breeching connection and seals itself when the water reaches the top. At this point firefighting water is available at the landing valves enabling fire fighters to attach their hoses and tackle any fire with the confidence that the water supply is plentiful.