What should be done if the P100 fails to create water pressure after 45 seconds?

If the P100 fails to create water pressure after 45 seconds, the appropriate action is to stop the pump, tighten all hose connections, and prime again. This is correct because a lack of pressure often indicates that there may be air leaks or loose connections in the hoses that can prevent water from being effectively pulled into the pump.

By stopping the pump and thoroughly checking and tightening all connections, it ensures that any air leaks are addressed, which can significantly improve the chances of the pump achieving proper suction and generating water pressure once it is primed again. Priming the pump is essential after addressing these issues to ensure that it is filled with water and can operate efficiently.

Other options, such as keeping the pump running, would likely exacerbate the issue, as the pump could continue to draw in air rather than water. Reducing the flow rate doesn't directly address the underlying issue of insufficient pressure creation. Checking the fuel level is relevant primarily for fuel-powered pumps, but it won’t resolve issues stemming from connection leaks or priming failures.