Pressurised Hyrant & Hosereel System & Equipment

The hydrant outlets normally have male national normal Threads (NST) to mate with fire hose couplings. The smaller outlets, occasionally named the hose nozzles or connections, are 2.5-inch NST. The bigger out-lets, occasionally named the steamer nozzles or connections, are 4-inch or 4.5-inch NST. The outlet caps are secured towards hydrant entire body with brief lengths of chain. The terms hose network and steamer network day back towards 1800s. before the advent of modern day fire apparatus, minor fires had been frequently fought by connecting just one hose collection straight towards smaller outlet over a pressurized hydrant. when the fire was larger, a steam-powered pumper, named a steamer, took drinking water through the bigger hydrant outlet and pumped it into various hose lines.