Why are lead-free solders recommended for copper water supply piping?

Lead-free solders are strongly recommended for copper water supply piping primarily due to the health hazards associated with lead. Lead is a toxic metal that can pose serious health risks, especially when it is leached into drinking water from plumbing systems that use lead-based materials. The consumption of lead-contaminated water can lead to various health issues, including developmental problems in children, neurological damage, and increased blood pressure in adults.

Furthermore, many plumbing codes and standards, including the International Plumbing Code, mandate the use of lead-free materials to promote public health and safety. These regulations are set to reduce the risk of lead exposure in potable water systems, ensuring that water used for drinking and cooking is safe.

While cost-effectiveness, conductivity, and plumbing code requirements are relevant factors in the context of plumbing materials, the paramount concern with lead-free solders is their role in preventing health hazards. This makes the recommendation for their use a significant step in safeguarding public health.