Good day. I've moved into a house that has had central heating pipework
installed (all copper, with soldered joints). I plan to complete the work
soon, installing radiators and a boiler.

Is there a way to test the integrity of the pipework (i.e., test for leaks)
prior to fist use?

In each room, the radiator inlet and outlet pipes are projecting up through
the floor, and have been capped off.

In the kitchen, the feed and return pipes terminate with open ends, where
the boiler will be located.

Does anyone knows of a way to test for leaks in the pipework, prior to
first use, say, by using compressed air or something? If it's a way that
helps locate any leaks, even better! Judging by the other pipework in the
house, the guy that installed it was not terribly professional.

Thank you.

Al