UFH pipe leak in uncommissioned system??

Not that I know much about UFH , I pressurised mine to test with hosepipes connected to the manifold, our pressure is over 5 bar.
The 'reveal' is not a fountain in the living room, it's a test to pump water into the system (the loop of suspect pipe in this case) and seal it in. Any leak will cause a drop in pressure over the test period...perhaps only after a few minutes. If the pressure remains stable for 24 hours or more it can be considered free of leaks.
 
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