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2. Glossary of firefighting equipment - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_firefighting...

   A pipe that screws directly into the main water supply that has two outlets on each side. Double male Hose coupling adapter with two male-threaded connectors back-to-back; used for connecting two female couplings together. Dry chemical A fire extinguishing agent. It works by breaking the chemical chain reaction in the "fire tetrahedron". Dry ...

3. Hose clamp - Wikipedia

   en.wikipedia.org/wiki/Hose_clamp

   A hose clamp used to hold the leather in place while tying-in the bag of bagpipes. They can also be used in a similar way, as a simple means for the transmission of small amounts of power. A short length of hose is clipped between two shafts where vibration or variations in alignment may be taken up by the flexibility of the hose. This ...

4. Plumbing - Wikipedia

   en.wikipedia.org/wiki/Plumbing

   A pipe is typically formed via casting or welding, whereas a tube is made through extrusion. Pipe normally has thicker walls and may be threaded or welded, while tubing is thinner-walled and requires special joining techniques such as brazing, compression fitting, crimping, or for plastics, solvent welding.

5. Piping and plumbing fitting - Wikipedia

   en.wikipedia.org/wiki/Piping_and_plumbing_fitting

   Push-to-pull fittings are easily removed compression fitting that allows pipes to be connected with minimal tools. These fittings are similar to regular compression fittings but use an O-ring for sealing and a grip ring to hold the pipe. The main advantage is that it can easily be removed and re-used, it is easy to assemble, and the joints are ...

6. Nipple (plumbing) - Wikipedia

   en.wikipedia.org/wiki/Nipple_(plumbing)

   A close nipple can only be unscrewed by gripping one threaded end with a pipe wrench which will damage the threads and necessitate replacing the nipple, or by using a specialty tool known as a nipple wrench (or known as an internal pipe wrench) which grips the inside of the pipe, leaving the threads undamaged. When the ends are of two different ...

7. Cheater bar - Wikipedia

   en.wikipedia.org/wiki/Cheater_bar

   "Use the approved tool for the job. Makeshift arrangements such as the use of a screwdriver as a chisel , a pair of pliers as a wrench, a wrench as a hammer , or overloading a wrench by using a pipe extension (cheater bar) on the handle are not to be employed."