Journeyman Plumber ExamWater Supply SystemsEasy
A plumber is installing a water distribution system in a new commercial building. The building's potable water supply is subject to significant pressure fluctuations, occasionally dropping below 20 psi. Which of the following devices is most appropriate to ensure consistent water pressure throughout the building?
- AWater pressure booster pump
- BThermal expansion tank
- CBackflow preventer
- DPressure reducing valve
Show answer & explanationAnswer & explanation
Correct answer: A. Water pressure booster pump
A water pressure booster pump is specifically designed to increase and stabilize water pressure in a system when the incoming supply pressure is insufficient or fluctuates significantly. This ensures adequate pressure for all fixtures and appliances.
Why the other options are wrong
- B. A thermal expansion tank absorbs expanded water volume from heating, preventing excessive pressure, not boosting low pressure.
- C. A backflow preventer protects the potable water supply from contamination, not pressure fluctuations.
- D. A pressure reducing valve lowers high incoming pressure to a safe level, it does not increase low pressure.
Water Pressure Booster Pump
A device used to increase and maintain consistent water pressure within a building's distribution system, especially when the municipal supply pressure is inadequate or fluctuates.
- Increases low water pressure
- Maintains stable pressure
- Often includes a pressure tank and controls
Memory trick: When pressure's low, a Booster makes it flow!