To diagnose a plumbing issue, plumbers first gather information about the symptoms, such as unusual odors or changes in water levels. For example, noticing a sewer smell after using a fixture upstairs or observing water movement in a toilet after flushing another can indicate a venting problem. A plumber will often start by flushing fixtures to observe the response.
If the water level fluctuates or exhibits other abnormal behavior, it may suggest a venting issue where air is not properly escaping through the vent pipes. A plumber may use a camera to inspect the pipes for obstructions or damages. Common findings include blockages caused by debris or animals, or unexpected water accumulation, indicating possible sagging or pipe dips.
In cases where the camera reveals standing water in the pipes, plumbers might hypothesize that the pipe has sagged over time, creating an unintended trap that obstructs airflow and causes backup. To pinpoint the exact location of the problem, a plumber may use a drain camera locator, which emits a signal that can be traced to find the blockage or sagging area.
Once identified, resolving such issues often requires significant repairs, such as excavating and replacing the affected pipe sections. By using these tools and techniques, plumbers can accurately diagnose and address a wide range of plumbing issues.
