Is the use of leaded solder permitted in the heating portion of a combination heating/hot water system?

The use of leaded solder in the heating portion of a combination heating/hot water system is not permitted due to health and safety regulations regarding the potential leaching of lead into the water supply. Lead is a toxic substance, and its presence in potable water systems poses serious health risks, particularly for vulnerable populations such as children and pregnant women.

By choosing 'Yes', it suggests a misunderstanding of the stricter controls surrounding the materials that come into contact with drinking water. In essence, all solder used in systems that carry potable water must comply with specific standards that prohibit lead content to ensure safe drinking water and protection of public health.

The correct answer aligns with modern plumbing codes and health regulations which mandate the use of lead-free solder in all applications involving drinking water. Understanding this context is crucial for ensuring compliance with safety standards and protecting public health.