How should PVC pipes be joined?

PVC pipes should be joined with solvent cement or adhesive, which is the most appropriate method for ensuring a strong and durable bond. The solvent cement works by softening the surfaces of the PVC pipes, allowing them to fuse together as the solvent evaporates. This creates a chemical bond that is just as strong as the pipe itself, making it suitable for various plumbing applications.

This joining technique is specifically designed for plastics, and PVC's molecular structure allows it to effectively adhere to the solvent. It is crucial to use the correct type of solvent cement designed for the specific diameter and type of PVC pipe being used to ensure compliance with plumbing codes and achieve optimal performance.

Other methods such as welding with high heat or threading the ends are not appropriate for PVC. PVC is a thermoplastic material that does not weld well under heat, and standard threading can compromise the integrity of the pipe and lead to leaks. Similarly, mechanical connectors may be used but are typically not the preferred method for joining PVC pipes as they can introduce potential failure points. Therefore, solvent cement remains the most effective and widely accepted method for joining PVC pipes in plumbing systems.