Thanks for your reply Spruce
"Surely you mean deactivated"
Sorry for the confusion! The float switch is activated when the water rises and prevents anymore water entering the IBC.
Yeah thats what i thought about the pressure switch wiring , it'll still cut the power whichever line it is installed on, ideally wanted to male sure the pump wasn't live.
One of the 2 wires must be live but there is no indication as to which one, as they are both black.
Has anyone wired in a high pressure switch to their Aquatec booster pump and if so how did you determine which wire is live?