Once prime has been achieved, is it necessary to continue flowing water to maintain the draft?

Once prime has been achieved, maintaining the draft does not require continuous water flow. The key point is that once the pump has successfully created a prime, it can maintain the ability to draft water from the source without needing a constant flow. This is because the pump is capable of drawing water through the system due to the vacuum created during priming, allowing it to operate efficiently.

In scenarios where the pump is properly primed and working under stable conditions, the system can maintain the draft effectively without the need for constantly flowing water. This characteristic can be particularly advantageous during firefighting operations, as it allows the operator to manage other tasks without the constant need to monitor water flow. The answer illustrates an important operational principle in managing pump performance and efficiency in drafting situations.