Which type of connection is discouraged when installing gas piping?

Using improper materials or incompatible fittings for gas piping connections is discouraged because it can lead to serious safety hazards, including gas leaks and potential explosions. Gas systems must be made from materials that are specifically designed to handle gas pressures and are resistant to corrosion and degradation. When incompatible materials or fittings are used, they may not provide a secure seal, resulting in leaks.

For example, certain plastics or untreated metals may corrode or degrade when exposed to gas, leading to failure of the connection. It is crucial to use approved and compatible materials, such as specific types of metal and PVC for proper applications, ensuring the integrity and safety of the entire gas system. Proper installation and adherence to local codes and standards are vital to prevent dangerous situations in residential or commercial gas installations.