Which type of pipe is recognized for being inexpensive, lightweight, and suitable for hard water areas?

The correct choice is PVC, which stands for polyvinyl chloride. This type of pipe is known for its affordability and lightweight properties, making it easy to handle and install. PVC is also resistant to corrosion, which can be particularly advantageous in areas with hard water, as hard water can lead to scaling and buildup that might affect other types of pipes, such as copper or steel.

Additionally, PVC pipes have a smooth interior surface that inhibits the accumulation of mineral deposits, further enhancing their effectiveness in hard water conditions. This combination of cost-effectiveness and suitability for diverse water quality makes PVC a popular choice for residential and commercial plumbing applications.