PVC joints are one of the simplest PVC fittings and are of course the cheapest. They are small parts that connect or "pair" one part to another, usually permanent. They can connect pipes to pipes, connect pipes to fittings, and even attach fittings to fittings. We may use PVC joints frequently, but we will find plumbers to install them normally. We will not install them ourselves. But in fact, sometimes if it is not convenient, learn how to install and use, you can also. Next, let me talk about how to install and repair PVC couplings.