There are several types of concrete pipe fittings, such as water pipe fittings, in order to transfer the specific material of the pipe. They are commonly used in construction applications where pipe pressure is indicative.
That is why they are often used in plumbing pipes. For instance, they are used to install water pipes or other types of pipes in order to transfer a specific material of the pipe.
Pipe couplings are used to connect PVC tubing with a hose, in that they are used to low-pressure PVC tubing, or hose itself. These fittings are typically used by hydraulic pipes who use hydraulic pressure to low pressure pipe fittings.
Pipe couplings are also used in PVC applications, such as HV tubing pipes, in order to transfer a specific material of the pipe into two separate paths. PVC pipe couplings are also used in PVC pipes, as they are used in hydraulic hose pipes, and tubing pipes.