PPR ball valves are classified into the following three categories according to their connection method:
1. Equal diameter ball valve: A type of PPR ball valve, belonging to PPR pipe fittings.
2. Internal thread ball valve: One end is a PPR material interface, and the other end is an internal thread interface, used to connect metal pipes or other threaded fittings.
3. External thread ball valve: One end is a PPR material interface, and the other end is an external thread metal interface; a type of PPR ball valve.
