Red Seal Plumbing Practice Exam

A settlement loop is a section of water distribution lines that is designed to provide flexibility and allow for movement of the soil without damage to the pipes. It is typically installed where there is a potential for ground movement or changes in temperature. In order for a settlement loop to effectively absorb movement, it must be large enough in diameter. Sizes larger than 2 inches are recommended to ensure proper functioning of the settlement loop. Therefore, the maximum size for water distribution lines to have a settlement loop installed is 2 inches, making option A the correct answer. The other options are incorrect because they all exceed this recommended size and may not provide the necessary flexibility for the settlement loop to work effectively. Failure to install a settlement loop or using a size smaller than 2 inches can lead to damage to the pipes and result in costly repairs.