Main plumbing vents play a crucial role in your home's drainage system, allowing air to enter the plumbing and preventing vacuum formation that can lead to slow drainage or gurgling sounds. Signs of a vent issue may include slow drains, foul odors, or even sewage backups. Understanding the importance of proper venting can save you from costly repairs and health hazards. Factors like the age of your plumbing, local building codes, and potential blockages can all influence vent performance. Curious about how to identify and address these issues? Ask Improvi.ai for personalized guidance.