What is the purpose of a drip leg in gas piping?

The purpose of a drip leg in gas piping is to collect condensate and prevent it from entering appliances. Condensate refers to the moisture that can form in gas systems due to the cooling and expansion of the gas as it travels through the pipes. If this moisture were allowed to reach the appliances, it could cause malfunction, corrosion, and potentially hazardous situations. The drip leg is designed as a low point in the pipeline where this condensate can accumulate safely. Maintenance and regular checks of the drip leg ensure that any collected water is removed, thus protecting the integrity and functionality of the gas appliances connected to the system.