I've got a shurflo pump - they have a inbuilt pressure switch - and normally when you attach a flow controller to it, you disconnect the pressure switch and the flow controller does the same job. Basically the pressure switch senses when there's a dead end (i.e. you stop the flow using an aquadapter/tap/nip the hose) and it switches off the pump until the flow is allowed to run again.
It's just two wires that run from the top of the pump into the pressure switch at the bottom of the pump.
I might stick a pic up later; I've my pumps in the house.