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? 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.
While NST prevails as the go-to thread standard for fire hose and fire department connections, historically-rooted differences remain
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