When water pressure is insufficient, what system may be used to increase the pressure for plumbing fixtures?

The correct response is the water pressure booster pump, as it is specifically designed to increase the water pressure within a plumbing system. In scenarios where municipal water supply pressure is inadequate for effective operation of plumbing fixtures, a booster pump ensures that the water delivered to those fixtures is at the desired pressure level. This is particularly important in multi-story buildings or areas far from the main water supply, where pressure drops occur.

Pressure relief valves serve a different purpose; they are designed to release excess pressure to prevent system damage rather than increase pressure. Hydrostatic lift pumps are also typically used in scenarios involving the lifting of water from lower to higher elevations but do not focus on increasing pressure for existing plumbing fixtures. Gravity-fed systems rely on the force of gravity to move water and do not actively increase pressure; they can face limitations when the elevation of the water source is lower than the fixtures served.

Understanding the operational context of plumbing systems is crucial, and recognizing the specific role of a water pressure booster pump reinforces the importance of maintaining adequate pressure for optimal function in residential plumbing systems.