What is the primary purpose of a gas pipe in plumbing?

The primary purpose of a gas pipe in plumbing is to distribute natural gas to appliances. Gas pipes are specifically designed to transport natural gas from the supply source to various appliances such as furnaces, water heaters, stoves, and dryers. This distribution system ensures that gas reaches each appliance safely and efficiently, allowing them to function properly.

The design and construction of gas pipes are regulated to ensure safety and prevent leaks, which is critical in maintaining the integrity of the gas supply system. Proper installation and maintenance of gas pipes ensure that energy is delivered effectively for heating and cooking applications.

In contrast, measuring gas pressure is typically done with separate devices known as pressure gauges, which are not part of the piping system itself. Venting excess gas outside is a function of venting systems or safety mechanisms, rather than the gas pipe itself. Filtering impurities from the gas is managed by separate filtration devices and systems, not by the gas pipes. Thus, the correct choice focuses on the distribution role of gas pipes in plumbing systems.