What potential issue can arise from improper installation of a drain trap?

The potential issue that arises from improper installation of a drain trap is the escape of sewer gases into living spaces. A drain trap is designed to hold a small amount of water in order to create a barrier, which prevents harmful gases from the sewer system from entering the home or building. When a trap is improperly installed, it may not hold enough water or may even allow for backflow, thus failing to effectively seal off the sewer gases. This can lead to unpleasant odors and pose health risks, as some sewer gases, such as methane, can be toxic.

In contrast, increased water pressure, frequent maintenance needs, and higher energy consumption are not direct consequences of a malfunctioning drain trap. Increased water pressure typically relates to issues within the supply lines or system design, while frequent maintenance could stem from various plumbing problems not specific to traps. Higher energy consumption is generally linked to heating systems or appliances rather than drain traps. Therefore, the primary reason for being vigilant with drain trap installation is to prevent the escape of sewer gases into occupied areas.