Step 5 · Second Meter Reading and Comparison
After the waiting period has elapsed, return to the water meter and take a second, careful reading. Compare this new reading to the initial one you recorded (or the photo you took). If the numbers on the odometer have increased, or if the large sweep hand has moved from its original position, it confirms you have a leak somewhere in your plumbing system. The next step will be to determine if it's inside or outside.