I was also about to suggest Utilis. I have never used them personally but they seem to have achieved some great results on the scale of entire cities, finding leak hotspots (?damp spots, I guess?). As Aviv says you then need other technology to pinpoint the leaks - acoustic, pressure anomaly etc etc.
Published by Peter Williams, Founder and Principal at Peter Williams Solutions LLC
I was also about to suggest Utilis. I have never used them personally but they seem to have achieved some great results on the scale of entire cities, finding leak hotspots (?damp spots, I guess?). As Aviv says you then need other technology to pinpoint the leaks - acoustic, pressure anomaly etc etc.