Functions and Types Hydrant

Hydrant main function is as a source of water in case of fire, and did you know that in developed countries there is a standard coloration and markings specific to each hydrant system, while in third world countries it is not uncommon.
In the event of fire the fire hydrant should be easily visible and can be used immediately. National Fire Protection Association (NFPA) in specific states that the fire hydrant must be colored with chrome yellow or other colors that are easily seen include white, bright red, chrome silver and lime-yellow, but in fact the most important aspect is the color should be consistent, especially in one certain areas.
NFPA recommends that in general there is a difference in function between the fire hydrant to the needs of urban (municipal systems) and personal needs (private system) included in it for the factory, so there should be different of color and other marking. Internationally, the color violet (light purple) was developed as a color for non-potable water.
Fire Hydrant.Org one website that provides input regarding the hydrant as follows:

Suply	Body Color
Municipal System:	Chrome Yellow
Private System:	Red
Non-Potable System:	Violet (Light Purple)

Another feature of tagging is a flow indicators, NFPA standards for bonnets (hats hydrant) and caps (stoppers hydrant) should be marked in accordance with the strong indications of hydrant flow pressure (20 psi) and the default code as follows:

CLASS C	Less than 500 GPM	Red
CLASS B	500-999 GPM	Orange
CLASS A	1000-1499 GPM	Green
CLASS AA	1500 GPM & above	Light Blue

This article is an excerpt from http://www.reindo.co.id Very good for our knowledge of hydrant.

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