Fire hydrants may be referred to by other common names, such as “fireplug” or “Johnny pump” determined by the area. In the previous time, before fire hydrants were devised, firefighters had no option but to use bucket brigades or hand pumps to deliver water for putting out fires.
Fire hydrants also are known as the standpipe, are used with the various water system. A hydrant is mainly used to permits the flow of water from the attached firefighter’s hose to put out a fire. If you want to know more about fire hydrant browse http://www.cakengineer.com/product_des.php?homeid=41&f_type=24 (which is also known as “ดับเพลิง hydrant http://www.cakengineer.com/product_des.php?homeid=41&f_type=24” in the Thai language).
These days, firefighters join their fire hose to the hydrant and open a valve to release water from the water main to the hose. Hydrants can be fitted with several types of valves so that they may be connected to a desire to water supply, either pressurized or not.
Most fire hydrants are made to accommodate a rate of flow of no less than 250 gallons (about 950 liters) per minute.There are usually two types of hydrants: the dry reservoir along with the wet barrel. The wet barrel hydrant comprises a continuous supply of water, while a valve has to be discharged to allow water flow.