What is drafting water supply?

• A. Drawing water from a pressured hydrant into the pump.
• B. Supplying water from a pressurized source to the apparatus.
• C. Supplying water from a portable tank via gravity.
• D. Drawing water from a static source using a pump and suction hose to supply the apparatus.

Answer: (D)

Drafting water supply means drawing water from a static, unpressurized source and delivering it to the pump using a suction hose. The pump creates the vacuum needed to lift the water from the source into the pump, often with a strainer at the intake and proper priming to maintain the prime. This setup is used when hydrants or other pressurized sources aren’t available, and it relies on suction rather than pressure to move the water.

This is different from drawing water from a pressured hydrant or supplying water from a pressurized source, which rely on existing pressure rather than suction. It’s also different from gravity feeding a portable tank, which uses gravity to move water rather than pumping and suction.