Which issue could lead to low water pressure in a plumbing system?

Low water pressure in a plumbing system can often be attributed to physical obstructions within the pipes. Mineral deposits, sediment buildup, and other clogs can restrict water flow, leading to reduced pressure throughout the system. As water flows through pipes, it carries minerals that can settle and accumulate over time, especially if the water supply has high mineral content. This buildup can narrow the internal diameter of the pipe or even block it entirely, significantly impacting water flow and pressure.

In contrast, high water temperatures typically do not cause low water pressure; they can affect the performance of certain fixtures or the efficiency of heaters but not the overall pressure levels. Energy-efficient fixtures are designed to use less water without necessarily impacting pressure adversely, and larger pipe diameters generally allow for better flow and can actually help maintain higher pressure instead of causing a decrease. Understanding the different factors that affect water pressure is crucial for identifying and resolving issues in plumbing systems.