Hydrants and Accessories

A short guide to Hydrants and Accessories

How the systems work

A hydrant network delivers water to hydrant valves and hose points around a building or site. Sprinkler systems discharge automatically through heat activated heads. Hose reel boxes give first aid fire fighting. Deluge systems use open heads and a deluge valve for high hazard areas such as transformer rooms. Foam systems are used where flammable liquids are stored or handled.

Codes normally referred to

Sprinkler systems are usually designed to NFPA 13. Standpipe and hose systems are covered by NFPA 14, and underground mains and hydrants by NFPA 24. In India the National Building Code of India 2016, Part 4, sets fire and life safety requirements, and the local fire authority has the final say for a project.

What a project involves

A typical scope covers hydraulic design, the pipe network, valves, pumps, sprinkler heads or hydrant points, and commissioning. At commissioning the pipework is pressure tested and the system is flow tested.

What to decide early

• The hazard classification of each area, which sets the water demand.
• The water storage and the pump duty.
• The pipe material and joining method for each section.
• Which areas need deluge, foam or water mist instead of standard sprinklers.

This is general information. The governing code, the project design and the local fire authority decide the exact requirements for your site.

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