What must be installed in a gas pipe when condensation is present in a fuel gas line?

When condensation is present in a gas pipe, it is essential to install a drip pipe to ensure that any accumulated moisture can be effectively removed. Gas lines can experience temperature fluctuations, resulting in the formation of condensation, which can lead to several issues, including corrosion, water hammer, and reduced efficiency of burners or appliances.

A drip pipe is specifically designed to capture and drain away any liquid that forms within the gas line, preventing it from creating problems downstream. It typically incorporates a trap or low point where water can collect and be easily drained. This installation helps maintain the integrity of the gas system, ensuring safe and efficient operation by keeping the gas line dry and free from obstructions caused by water accumulation.

Other options, such as a pressure switch, expansion tank, or check valve, do not specifically address the issue of condensation within the fuel gas line. A pressure switch is used to monitor and control gas pressure, while an expansion tank is designed to accommodate thermal expansion of fluids in hydronic systems. A check valve prevents backflow, but none of these solutions target the problem of condensation directly as the drip pipe does.