What type of fittings should be used to connect dissimilar materials in plumbing?

Using transition fittings designed for joining different materials is the most appropriate choice because these fittings are specifically engineered to safely and effectively connect pipes made of various substances, such as metal to plastic. They take into account the different properties, expansion rates, and structural characteristics of the materials involved to ensure a secure and leak-free connection.

Dissimilar materials can react differently under pressure and temperature changes. Transition fittings help accommodate these differences, minimizing the risk of damage or failure at the joint. They are often constructed from materials that are compatible with both types of piping being joined, which further enhances their effectiveness.

On the other hand, standard pipe fittings, compression fittings, and elbow fittings serve specific purposes but do not provide the specialized connection required for dissimilar materials. Standard fittings typically work best with the same type of material, compression fittings are primarily for securing a joint without needing a complete connection, and elbow fittings are just designed for changing the direction of a single pipe rather than joining different materials. Therefore, utilizing transition fittings is crucial for maintaining the integrity and safety of plumbing systems that involve various materials.