What is the best practice for joining PVC pipe?

Using a primer followed by solvent cement is recognized as the best practice for joining PVC pipe because this method ensures a strong and durable bond. The primer serves to soften the surface of the PVC, allowing the solvent cement to penetrate more effectively and create a robust, permanent connection as it chemically fuses the pipe and fitting together. This approach not only enhances the strength of the joint but also minimizes the risk of leaks, which can occur if proper preparation and materials are not utilized.

Other methods, such as using only a mechanical connector or simply gluing the ends together without preparation, may not provide the same level of reliability. Mechanical connectors can offer flexibility but may not be suitable for all applications or pressures, while inadequate surface preparation, like skipping the primer, can result in a weaker bond that may fail under stress. Wrapping the joint with tape is not a standard practice for PVC and does not create a proper seal, potentially leading to future leaks. Thus, using primer and solvent cement is the most effective and widely accepted method for ensuring a secure and lasting PVC joint.