What is the primary function of a drip leg in gas piping?

• A. Regulates pressure
• B. Collects condensate
• C. Filters gas
• D. Prevent leaks

Answer: (B)

Drip legs are used to remove moisture from gas lines by creating a low point where condensate can settle out of the flowing gas. The vertical pocket and bottom drain provide an easy place to collect and then drain water and other liquids, protecting appliances and downstream components from moisture-related problems. This function is about condensate management, not about changing pressure, filtering particulates, or preventing leaks. Pressure regulation is handled by a separate regulator, filtration is handled by a filter assembly, and leaks are prevented by proper fittings and sealing.