All wet-riser pipes remain charged with water at systems pressure. The opening of a hydrant landing valve or hose reel on any floor reduces the pressure in the pipeline and starts the hydrant pump. Pump-sets of suitable capacity are provided for this purpose. Because of the static pressure differential caused by the change in floor height, a multi-stage pump is employed so that different tapping can be taken from the output of the pump. Each of these tapping can be used to serve more than one floor. Pumps-sets should be fed with reliable electric supply from a separate feeder and it is therefore also desirable to have a stand-by diesel pump.
Guidelines and approval for Hydrant
System are available from various national and
international organizations like: NBC, NFPA, TAC,
IS, FM and Local Fire Authorities.
Components of the System
• Fire Fighting Pumps & Accessories
• Landing Valves
• Hose Reel
• Branch Pipes & Nozzles
• Fire Brigade Connections
• Wiring & Instrumentations
• Maintenance Valves