I need advice from people who have dealt with water leaks before, because I’m at a loss. Strange things started happening with the water in my house. Pressure drops and then it coming back and it happens multiple times diring the day, also my wather bills have increased a lot. There are no visible leaks, and all the pipes looks fine. But, I think the problem is with them. I’ve already tried looking for the leak myself and even call a plumber. Nether I or the plumber find anything. Then i started looking for solution online and found Mayaglobal's global water leak detection services, which promise to locate the problem without digging. This variant looks good, but I’m not sure whether I should contact them or look for cheaper options. Has anyone dealt with services like this before, or even specifically with this one? And how can I tell if the problem really needs a professional diagnosis? In general, who should I contact first in cases like this?