What could be a potential consequence of improper drainage installation?

Improper drainage installation can lead to an increased risk of water damage for several reasons. When drainage systems are not installed correctly, they may fail to direct water away from structures as intended. This can cause water to pool around foundations, resulting in leaks and potential structural damage. Additionally, the accumulation of water can promote mold growth and damage to interior finishes. Therefore, ensuring proper drainage installation is essential for protecting buildings from water-related issues.

In contrast, the other choices do not align with the outcomes of improper drainage. For instance, while improved water quality and enhanced plumbing efficiency are desirable conditions, they are unlikely to result from faulty drainage installation. Similarly, reduced water pressure is typically related to problems within the water supply system rather than drainage issues. Hence, the connection between improper drainage and increased water damage is clear and emphasizes the importance of proper installation.