Why is it crucial to have a dirt leg in a propane system?

Having a dirt leg in a propane system is crucial because it effectively traps moisture and debris that may be present in the gas supply. Over time, contaminants such as dirt, rust, and water can accumulate in the propane system, potentially leading to blockages, corrosion, and inaccuracies in the operation of the system. By incorporating a dirt leg, these impurities are captured at a low point in the piping, ensuring they do not enter the main components of the system or affect the performance of appliances and controls. This mechanism helps maintain the integrity of the propane system, promotes efficient operation, and extends the lifespan of its components. In contrast, other aspects such as evaporation, pressure build-up, and flow rate management are primarily addressed through different design features and operational controls in a propane system.