As a result, the design and quality of coupling threads varied from blacksmith to blacksmith and from community to community. These hoses connected to fire plugs with couplings made by local blacksmiths. Instead of hydrants, they used fire plugs, and their hoses were made of leather and rivets. Why are there different thread types and sizes?Īfter the development of hand-operated pumps in the 1700s, the city of Philadelphia crafted wooden water mains to make water more accessible to people fighting fires. Hermaphroditic connections: devices that feature both male and female threads.Coupling: a fitting with female threading on both ends that joins two male fittings together.Nipple: a device with male threading at both ends.Some other terms widely used with fire hose and fire department connection (FDC) threads include: The inside diameter of the female end (ID or IDF) measures the diameter of the pipe within the walls. The outside diameter of the male end (OD or ODM) is the diameter of that fitting at its widest point (including the threads themselves). When the thread types of two items match, they “mate,” which just means that the two items fit together functionally. When referring to threads, devices are often described as “male” or “female” and compatible items “mate.” The female item has internal threads, while a male item has external threads.
Thread pitch denotes the amount of space between threads in millimeters. TPI comes from the number of threads per inch on nozzles, hoses, and fittings. Thread size refers to threads per inch (TPI) and thread pitch. How do fire hose and fire department connection threads differ from one another?
#Fire hydrant adapters full#
If you already know what thread you need, feel free to jump on over and check out our full range of fire department connections, plugs and caps, fire hose, and fire hose adapters. We’ll look at the history of threads used in fire protection, learn what standards prevail today, and show you what solutions are available if your fire department connection threads don’t fit local fire hose. In this article, we dive into thread standards and thread sizing. Thread size, gender, and the materials used to construct a coupling can and do vary from city to city. If firefighters can’t quickly connect a fire hose to other devices - pumps, hydrants, or the inlets to supplement or supply water to a building’s fire sprinkler or standpipe system - lives may be needlessly lost or property unnecessarily damaged.īut there’s more to the threads used with fire department connections (FDCs) and fire hoses than meets the eye. When a fire breaks out, time is in short supply. They come equipped with a positive ratchet lock & thumb release mechanism to ensure error- and leak-free performance.While NST prevails as the go-to thread standard for fire hose and fire department connections, historically-rooted differences remain These hose adapters feature Elk-O-Lite / polished brass / polished chrome / rough brass construction for corrosion and rust resistance. Elkhart Brass fire hose and hydrant adapters are designed to meet the varied needs of firefighting applications. These fire and hose hydrants have a pin lug wrenching feature with a rocker lug which ensures leak-free performance. They come equipped with a tapered pipe thread on one end and a hose thread on the swivel. Fire hose adapters by Moon American feature aluminium / brass / cast brass / plastic construction for ductility, strength & corrosion resistance and rotate as the hose is moved around, to reduce the strain on the hose. Raptor Supplies offers a wide range of fire hose & hydrant adapters from brands like Dixon, Elkhart Brass and Moon American. Fire hose and hydrant adapters securely connect fire hoses to firetrucks, hydrants, nozzles & other water sources and help firefighters in emergencies.
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