Which method is usually discouraged when connecting copper pipe in cold environments?

Soldering is usually discouraged when connecting copper pipe in cold environments due to the potential issues with heat transfer and maintaining proper temperature during the soldering process. In colder conditions, the pipe’s temperature can drop significantly, which hinders the ability of the solder to flow and adhere correctly. Proper soldering requires a clean surface and a specific temperature range to ensure a strong bond, and in cold environments, achieving and maintaining this temperature can be challenging. As a result, the connection may not form properly, leading to leaks or weak joints.

In contrast, brazing or using mechanical methods, which can include fittings that do not require heat, may be preferable in these conditions. Compression fittings, for instance, can be easily assembled without the need for heat and are therefore more reliable when dealing with cold environments.