What could be a potential issue with incorrectly installed pressure relief valves?

Incorrectly installed pressure relief valves can lead to significant safety hazards, particularly through the risk of system overpressure. Pressure relief valves are crucial components designed to prevent equipment and system failures by releasing excess pressure. If these valves are not installed correctly, they may not function as intended, resulting in an inability to open under pressure conditions that exceed the safe operating limits of the system. This can lead to catastrophic failures, such as explosions or equipment damage, making it essential to ensure they are correctly installed and maintained.

The other options do not align with the implications of improper installation. Increased efficiency, lower maintenance costs, and enhanced safety features are benefits associated with properly functioning systems, while incorrect installations fundamentally compromise the safety and reliability of equipment, leading to the exact opposite of those advantages.