Which plumbing material is known to have been widely used before newer regulations discouraged its use?

The plumbing material known for its widespread use before newer regulations discouraged its use is polybutylene. This type of plastic pipe was commonly used in residential plumbing systems from the late 1970s until the mid-1990s. It was favored for its flexibility, low cost, and ease of installation. However, it was later discovered that polybutylene pipes were prone to degradation and failure, especially when exposed to chlorine in water systems. This led to numerous leaks and extensive water damage in homes, resulting in significant legal actions and ultimately prompting regulations that limited its use.

In contrast, materials like PVC, CPVC, and PEX have become popular alternatives due to their durability and resistance to various conditions. Understanding the historical context of polybutylene's use helps highlight the importance of material selection in plumbing systems and the continuous evolution of building codes and regulations to protect consumers and ensure plumbing safety.