What is the primary function of a dirt leg in a propane piping system?

In a propane piping system, the primary function of a dirt leg is to trap moisture and debris. This component is critical because it helps maintain the integrity and efficiency of the system. By accumulating unwanted particles and water, the dirt leg prevents these contaminants from entering downstream equipment, which can lead to malfunctions or reduced efficiency. Regular maintenance of the dirt leg is important to ensure that it effectively collects debris, thereby protecting the entire system from potential damage and maintaining safe operation.

The other options focus on functions that are not typically associated with the dirt leg. Regulating pressure and controlling temperature are roles performed by other components within the system, such as pressure regulators and heat exchangers. Enhancing combustion is also not relevant to the dirt leg's purpose, as it primarily serves as a filtration system to ensure clean propane flows through the piping.