What characteristics make a solder suitable for plumbing applications?

In plumbing applications, the suitability of solder is heavily reliant on its ability to flow well into joints and resist corrosion. Good flow properties ensure that the solder can easily fill gaps between metal surfaces, creating a strong bond and effective seal necessary for preventing leaks. When the solder flows properly, it promotes better adhesion and ensures uniform coverage, which is critical in plumbing where the joints may be under pressure.

Corrosion resistance is equally important because plumbing systems often carry water, which can lead to corrosion over time if the solder does not withstand the environment to which it is exposed. Corroded joints can result in leaks and system failures, so selecting a solder that maintains its integrity in the presence of moisture and various minerals in the water is crucial.

Although factors like melting point, flexibility, heat resistance, low cost, and strength can be relevant in other contexts, they do not specifically address the immediate needs of a plumbing application as effectively as flow properties and corrosion resistance do. Therefore, the right solder for plumbing needs to excel in these two characteristics.