Conduct A Test:
There is actually a very simple test that you can conduct on your own to find a mains water leak. First of all, turn off the stopcock, which will be located somewhere on your property. Confirm that it is turned off completely. For that, turn on a tap in your bathroom sink or kitchen, wherever you find it easier. After all the water is drained out of your home, the water will stop coming out from the tap, indicating that the stopcock is in fact, closed. Now, check your water meter, and snap a picture of the reading on your phone, or simply write it down. Water is no longer coming into your home, so the reading should remain constant, but if it’s increasing, then the obvious reason for that is the water is not passing your internal stopcock, but it is passing through the meter, which indicates the presence of leak. In any case, you have to be patient to catch the leak, especially if it’s a small one. So wait for two hours at least, and check the readings again.
But what if you don’t have a water meter in your home? Well, there is a solution for that too. To confirm the leak in the mains water pipeline, the pressure test is conducted between internal stopcock and external stop valve, because water is held or stays between them when both are turned off. However, for this test, calling a professional might be a better choice.