A pipe coupling is an important part of connecting pipe sections and keeping the pipes safe at the same time. It is very important for people who work with pipes and plumbing to have this pipe fitting. It is common for pipes to need to be cut or joined together to make changes in direction and cross over things like fences and pipes. This is a very short piece of pipe or tube. It has socket or female pipe threads at one or both ends that can be used with pipes. Two pipes or tubes of different sizes can be joined together to run a long pipe. Pipe couplings are used to do this.