How are PVC pipes typically joined?

PVC pipes are typically joined using solvent cement and fittings specifically designed for PVC. This method involves applying a solvent-based adhesive that softens the surface of the pipe and fitting, creating a chemical bond when they are joined together. This process ensures a secure and leak-proof connection that is strong enough to handle various pressure levels typically encountered in plumbing systems.

The reason why this method is favored for PVC is due to its efficiency and durability. Solvent cement creates a permanent bond that can withstand the internal pressure of the fluids flowing through the pipes, making it suitable for a wide range of applications, from residential plumbing to industrial systems.

Mechanical couplings, while useful in some situations, do not provide the same level of permanent bonding as solvent cement. Welding is not applicable to PVC, as it is a plastic material, and welding techniques are suitable for metals. Compression fittings can be used for certain applications, but they are generally more common with pipe materials like copper or PEX, not PVC.