What indicates that the pump has successfully drafted water?

A steady stream of water that is void of air flowing beneath the truck is a clear indicator that the pump has successfully drafted water. When the pump is properly drafting, it creates a vacuum that allows water to be drawn from the source. This process should produce a continuous and smooth flow of water, free from air bubbles, which signifies that the system is functioning effectively and is well-sealed. Air in the line can lead to issues like cavitation, which can damage the pump, so the absence of air ensures that the pump is adequately primed and operating as intended.

In contrast, loud noises from the pump may indicate cavitation or other operational issues, rather than successful drafting. Significant fluctuations in the pressure gauge can signify problems with the drafting process or water supply inconsistencies, not an indication of successful water drafting. Lastly, bubbling from the water source can be a sign of air being sucked into the system, which is counterproductive to successful drafting and could lead to operational problems.