In a building, a fire hydrant system is a safety measure or emergency equipment required in some buildings that comprises a series of components that when assembled together provide a source of water to assist fire authorities in a fire.
Putting it another way, a fire hydrant system is a water supply with sufficient pressure and flow delivered through pipes throughout a building to strategically located network of valves for fire-fighting purposes.
In some circumstances, water from a reticulated fire hydrant system can also be shared with other safety measures such as automatic fire sprinkler systems or fire hose reels.
In Australia, the Building Code of Australia (BCA) sets out the Deemed-to-Satisfy (DtS) provisions for a fire hydrant system required in buildings to the degree necessary to facilitate the needs of the fire brigade for;
- fire-fighting operations; and
- the floor-area of the building; and
- the fire hazard.
Fire hydrant systems are designed and installed in accordance with Australian Standard AS2419 and comprise the following primary components;
- Water Supply & Water Storage
- Pipework & Valves
- Fire Brigade Booster
- Hydrant, Hydrant Valve or Landing Valve & Coupling
- Layflat Fire Hose
- Block Plan
When designing a fire hydrant system specific performance objectives must be satisfied. These performance objectives require a hydraulic analysis to demonstrate there is sufficient water pressure and flow at the most hydraulically disadvantaged hydrant.
The pressure and flow requirements vary according to the building classification, floor area and sprinkler protection.