In what applications are copper and copper alloys commonly used?

Copper and its alloys are widely recognized for their excellent corrosion resistance, high thermal and electrical conductivity, and overall durability, making them highly suitable for plumbing applications. In plumbing, copper is often used for pipes and fittings because it can handle high water pressures and temperatures without degrading. It is also resistant to deterioration caused by water, which ensures a long lifespan for plumbing systems. The antimicrobial properties of copper contribute to maintaining water quality, making it a preferred choice in both residential and commercial plumbing installations.

The other options mentioned may involve some use of copper or its alloys, but they are not as central to the primary applications of these materials. For instance, while copper is indeed used in electrical connections due to its conductivity, the choice of plumbing applications directly emphasizes the fundamental role of copper in systems that manage water flow.