National Center for Construction Education & Research (NCCER) Plumbing Level 1 Practice Exam

Installing a booster pump is an effective way for a plumbing technician to increase the pressure of water inside a building. A booster pump is specifically designed to enhance water pressure and can be used in situations where the existing water pressure is insufficient to meet the demands of the plumbing system.

Booster pumps operate by drawing in water from the existing supply and increasing its pressure before it enters the plumbing lines. This is particularly useful in multi-story buildings where water must travel up several floors, or in areas where the supply pressure from the municipal source is too low for effective operation of plumbing fixtures.

The other options are not as directly effective or practical in increasing water pressure. For instance, replacing all pipes with larger diameter pipes may improve flow rates, but it will not necessarily increase pressure if the source pressure remains unchanged. Increasing the municipal water supply pressure is outside the control of an individual technician and typically requires collaboration with local water authorities. Limiting the number of fixtures on a water line could reduce demand and potentially improve the situation, but it doesn't increase pressure in the system. Therefore, using a booster pump stands out as the most direct and practical solution for enhancing water pressure within a building.