Texas Commission on Environmental Quality (TCEQ). Class C Water License Exam

Which water system component helps maintain pressure and provides water on demand?

1. Storage tank

2. Pump

3. Hydro pneumatic tank

4. Filtration unit

The correct answer is: Hydro pneumatic tank

The correct choice is the hydro pneumatic tank. This component is specifically designed to maintain water pressure within the distribution system and ensure an adequate supply of water on demand. By utilizing a combination of air and water, a hydro pneumatic tank acts as a pressure vessel, which compresses air to create the necessary force to push water through the system when it is required. As water is drawn from the tank, the air pressure adjusts accordingly, allowing for a steady flow of water without significant drops in pressure. This is crucial in providing reliable service to consumers, particularly during peak usage times. In comparison, while storage tanks hold water, they do not actively maintain system pressure or respond dynamically to water demand; instead, they mainly serve as reservoirs. Pumps are very important in moving water through the system but do not directly maintain pressure in the same way that a hydro pneumatic tank does. Lastly, filtration units play a critical role in purifying water but do not influence pressure or water availability directly. Hence, the hydro pneumatic tank is integral to balancing pressure and providing a consistent water supply when needed.