What is the purpose of a vent pipe in a plumbing system?

What is the purpose of a vent pipe in a plumbing system?

A vent pipe in a plumbing system serves the important purpose of allowing air to enter the system, which helps maintain proper pressure and prevent sewer gases from backing up into the building. This helps to ensure that waste water can flow freely and prevent issues such as gurgling drains and slow drainage.

By allowing air to enter the system, a vent pipe also helps to prevent siphoning of water from the traps in the plumbing fixtures, which could otherwise lead to foul odors and potential health hazards. Overall, vent pipes play a crucial role in maintaining the efficiency and safety of a plumbing system.