Hydrant Systems

A hydrant system is the most basic constituent of a comprehensive fire fighting system.  It consists of an underground and over ground piping network, which is connected to the fire water pumps through common headers installed in fire water Pump house. Hydrant valves are installed on stand posts, which are in turn connected to the main header pipes. Each hydrant valve is strategically located around the protected areas to combat a fire.

The major equipment and materials of Hydrant system consist of the following:

(i) Fire Fighting Pump sets (Electric Motor Driven Hydrant Pump and Stand by Diesel Engine Pump, together with a jockey pump for pressurisation)
(ii) Main header piping, both underground & over ground
(iii) Isolating valves
(iv) Hydrant / landing valves
(v) Hose pipes with couplings
(vi) Branch pipe with nozzles
(vii) Hose Boxes for Internal/External Hydrants
(viii) Hose House

For yard hydrants, the necessary branch pipe with nozzles and 15 M long hoses will be kept in Hose houses/boxes, as per system requirement. Internal Hydrants will be provided with Hose boxes each containing two lengths of 7.5 M long house and a branch pipe with nozzle.
In case of a fire, hose pipes are extracted from a hose box/house close to the area of fire and fitted onto the closest hydrant.  The nozzle fitted on the other end of the hose pipe is directed towards the fire and the hydrant valve opened.  The pipe network is kept pressurised with water and opening of the hydrant valve causes automatic starting of fire pump.  The discharge of water through the nozzle at designed pressure suppresses the fire.