What is a common symptom of a venting problem in a plumbing system?

A common symptom of a venting problem in a plumbing system is slow drainage or gurgling sounds in drains. This occurs because venting is essential for allowing air to enter the plumbing system, which helps to maintain proper flow and drainage. When vents are blocked or improperly installed, the pressure in the drainage system can become too low, leading to slow drainage. Gurgling sounds typically indicate that air is being pulled into the drain lines as water tries to flow past obstructions or through a restricted pathway, which can happen when air cannot efficiently vent outside.

Other symptoms of venting issues can include slow drainage in multiple fixtures, foul odors from drains (due to sewer gases), and possible backups. Effective venting ensures that the plumbing system can function correctly, preventing these problems and allowing for smooth operation.