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The 100 mm (4-inch) and 125 mm (5-inch) Storz couplers have been specified in NFPA 1963, Standard for Fire Hose Connections, since the 1993 edition. 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).
5-inch hose with 5-inch Storz (125 mm) couplings (allowed by NFPA 1963) 6-inch hose with 6-4 NH NFPA threads (NFPA 1963 requirement, but not commonly used in the U.S.) 8-inch hose with 8-4 NH NFPA threads (NFPA 1963 requirement, but not commonly used in the U.S.; only added to NFPA 1963 in the 2003 edition [11]) Non-standard hose couplings
Large diameter (4-inch (10 cm) or greater) hard suctions most often employ National Standard threaded brass connections while flex suction hose will typically use Storz fittings, which are genderless. 3-inch (7.6 cm) or smaller hard suction hose will typically use threaded fittings. In each case, the hard suction hose connection will match the ...
4 Connections. 5 Forces on fire ... 4 + 1 ⁄ 2, 5 and 6-inch diameters. ... In Central Europe, the Storz connector is used by several countries.
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Hose link is a 1/4-turn bayonet-mount garden hose connection, which uses an o-ring to o-ring seal. It was designed by Hoselink, Pty, Ltd., Australia, [ 24 ] and patented in 1998. [ 25 ] It is popular in Australia, with limited distribution in the UK and the US, where it is distributed by Dayco Products, Inc.