What is a typical sign of a sewer backup?

A typical sign of a sewer backup is gurgling sounds from drains or toilets. This occurs because the normal flow of wastewater is obstructed, creating pressure that forces air through the plumbing system. This pressure can lead to air bubbles, which result in gurgling noises as the waste struggles to pass through the disrupted pipes.

Gurgling sounds serve as an audible indicator that there may be a blockage within the sewer system, potentially indicating a more significant issue that requires attention. Recognizing this symptom is crucial for homeowners and maintenance personnel to address sewer line problems before they escalate further.