When using a flowing water source, what is a key operational advantage over drafting from a static source?

• A. Water is cooler, improving engine cooling.
• B. There is no need for hoses.
• C. The water supply is continuous, reducing prime losses and allowing more reliable discharge pressure.
• D. Water treatment happens automatically.

Answer: (C)

The main idea is that a flowing water source provides a steady supply to the pump suction, which cuts down on priming losses and helps the pump develop and keep a steady discharge pressure. When water is moving into the suction, the pump doesn’t have to spend time and effort to prime the system—to fill the pump and the suction line and expel air—which means you reach operating pressure faster and with less variation. That continuous feed also means the suction is less prone to air pockets and pressure dips, so the discharge pressure remains more reliable. In contrast, drafting from a static source requires priming and is more vulnerable to suction losses, which can delay or reduce the available discharge pressure. The other options don’t capture this practical advantage of a flowing source—the benefits aren’t about cooler water, eliminating hoses, or automatic treatment.