Fire Hydrant System, the oldest and still one of the most effective ones, Water and fire fighting will always be together. Globally, water is our most plentiful resource. It is inexpensive. When public water systems are present, it is available in an almost endless supply. When applied properly, it is very effective in absorbing heat and extinguishing fires. For these reasons, fire services throughout the world base their primary operations upon utilizing water as a fire extinguishing agent.
Water and fire hydrant systems involve substantial capital expense; however they typically last between 70 and 100 years. A properly designed and installed system is a long term investment in community safety and should be undertaken utilizing long term planning and appropriate engineering standards.
Consists of the following components:

• Sufficiently large water reservoir
• Fire pump sets (Main and Standby)
• Jockey pump set
• Hydrant valves
• Fire fighting hoses
• Branch pipe with nozzles

This system a network of pipes is laid out depending upon the risk with hydrant valves placed at strategic places. The spacing/distance between yard hydrants is guided by norms viz.

• N F P A
• Tariff Advisory Committee
• I S D
• Indian Bureau of Standards

The entire pipeline is kept pressurized with water. Whenever anyone opens a hydrant valve, the pressure in the pipeline reduces drastically and jockey pump set which normally keeps the total system pressurized is unable to cope with the system demand which results in further fall in pressure.
The further fall in pressure is sensed by the designated pressure switch which automatically starts the main fire pump set.
Depending upon the type and sensitivity of the risk, diesel-engine powered fire pump set should also be installed having 100% standby capacity.
System Components:

• Landing Valves
• Hoses
• Couplings
• Hose Reels
• Fire Brigade Connectors
• Branch Pipes & Nozzles