The answer to 'PEX pipe vs copper pipe' is that PEX (cross-linked polyethylene) and copper are both common choices for plumbing pipes, but they have distinct features, benefits, and use cases. PEX is a flexible, durable plastic pipe that is easier to install and often more cost-effective than copper. Copper is a traditional metal pipe that is known for its longevity and corrosion resistance, but can be more expensive and require more specialized installation.
PEX pipes are becoming increasingly popular for residential and light commercial plumbing due to their flexibility, resistance to freezing, and lower material and labor costs. Copper pipes are still preferred in some applications, such as where high heat or chemical exposure is a concern, or in areas with strict building codes. The best choice will depend on your specific needs, budget, and local regulations.