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NBS publishes the NFPA fire hose coupling standard in Circular No. 50 (first version), and notes that only 287 of the 8,000 cities and towns in the US had fire-hose couplings and hydrant outlets conforming to the standard. 1914-11-25 NBS Circular No. 50 Published 1915 NFPA published "Hose Coupling Record and Specifications" 1916
Indoor fire hose with a fire extinguisher. A fire hose (or firehose) is a high-pressure hose that carries water or other fire retardant (such as foam) to a fire to extinguish it. Outdoors, it attaches either to a fire engine, fire hydrant, or a portable fire pump. [1] Indoors, it can permanently attach to a building's standpipe or plumbing system.
U.S. cities that have fire hydrants with 125 mm Storz connectors include Raleigh, NC [5] and the City of Corvallis, OR (adapter on 4-inch threaded outlet). [ 6 ] The 150 mm (6-inch) size is occasionally used for PVC suction hose, in place of the industry-standard 6 NH threads.
The user (most likely a fire department) attaches a hose to the fire hydrant, then opens a valve on the hydrant to provide a powerful flow of water, on the order of 350 kilopascals (51 psi); this pressure varies according to region and depends on various factors (including the size and location of the attached water main).
External access point for fire sprinkler and dry standpipe at a building in San Francisco, US Antique wet standpipe preserved at Edison and Ford Winter Estates. A standpipe or riser is a type of rigid water piping which is built into multi-story buildings in a vertical position, or into bridges in a horizontal position, to which fire hoses can be connected, allowing manual application of water ...
The system comprises a collection of water reservoirs, pump stations, cisterns, suction connections and fireboats. While the system can use fresh or salt water, it is preferential not to use salt water, as it commonly causes galvanic corrosion in fire equipment. [2] Blue-topped AWSS fire hydrant in the Mission district of San Francisco.
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The device consists of two independent check valves, plumbed in series, with a pressure monitored chamber between (also known as the zone). The chamber is maintained at a pressure that is lower than the water supply pressure, but high enough to be useful downstream.