What should be done if a customer complains about a bad smell coming from the drains?

When a customer reports a bad smell coming from the drains, it's essential to inspect for clogs or a malfunctioning trap because these are often the underlying causes of unpleasant odors.

Drains can emit foul smells due to trapped food debris, stagnant water, or bacteria buildup, which are commonly associated with blocked pipes. Furthermore, a malfunctioning trap may allow sewer gases to escape into the home, resulting in noticeable and often unhealthy odors. By conducting a thorough inspection, the plumber can identify the specific issue, such as a clog or an improperly functioning trap, and take appropriate corrective actions—such as clearing the obstruction or ensuring the trap holds water to prevent gases from escaping.

Addressing the root cause rather than masking the symptoms is crucial in plumbing, as it ensures the health and safety of the household by preventing further complications related to plumbing issues.