What is the technique called for joining copper water pipes?

The technique used for joining copper water pipes is soldering. Soldering involves melting a filler metal, known as solder, which typically contains a combination of tin and lead or just tin, to create a permanent bond between copper pipes. This method is particularly effective for plumbing applications because it provides a strong, leak-proof seal and is relatively easy to perform with the right tools, such as a soldering iron, flux, and solder.

Soldering is ideal for copper pipes because it occurs at a lower temperature than welding and brazing. This prevents damage to the pipe due to extreme heat while ensuring that the joint is secure for water transport. The process requires cleaning the pipe surfaces and applying flux to prevent oxidation, facilitating a strong bond once the solder is applied.

Other methods, such as welding or brazing, require different techniques and temperatures. Welding often involves melting the base material itself, while brazing uses a filler metal that melts at a higher temperature than soldering. Gluing, while effective for various materials, is not suitable for metal pipes, particularly in plumbing, where pressure and temperature conditions demand a more durable connection.