Niedner revolutionized the fire industry by creating lighter, more versatile fire hoses and lay flat hoses to overcome those challenges.Instantaneous Fire Hose Couplings are commonly used by the Fire department for the delivery of water to fire fighting systems but are sometimes used as an industrial hose coupling. Instantaneous Fire Hose Couplings have a 2 ½" nominal bore head and terminates in a variety of sizes of BSP female thread, BSP male thread and hose tails.