There are three main connection methods of PVC drainage pipe: sealing rubber ring, bonding and flange connection.
1. Pipes with a diameter greater than or equal to 100 mm of PVC drainage pipes generally use rubber ring interfaces;
2. For pipes with a diameter of less than 100 mm, PVC drainage pipes generally use adhesive joints, and some use live joints;
3. When PVC drain pipes cross the sewers or other pipes, metal pipes are generally used. At this time, the plastic pipes and the metal pipes are connected by flanges. The connections between the front and rear of the valve and the pipes are also flanged.