Which plumbing device is NOT considered water-saving?

Standard faucets are typically designed without specific features aimed at reducing water consumption. Unlike flow restrictors and reduced flow shower heads, which are intentionally engineered to limit the amount of water that flows through them, standard faucets operate at full capacity without any restrictions. This can lead to higher water usage, especially compared to alternatives that are explicitly designed for water efficiency.

Flow restrictors and reduced flow shower heads help conserve water by minimizing flow rates while still providing adequate performance, making them inherently more water-efficient options. Pressure reducing valves, while not directly altering water consumption rates themselves, help regulate system pressure, which can indirectly support water conservation efforts when appropriately calibrated.

In summary, standard faucets do not incorporate inherent water-saving features, thus making them less efficient in terms of water usage compared to the other options listed.