How To Find A Water Leak Outside Underground. First, open your meter box. Splashing indicates that water is flowing around the outside of the pipe.
Water traveling through pipes makes distinct noises. Thankfully, you don’t have to be a professional plumber to confirm if you have a water leak underground. Check the water meter, write down the numbers, and wait another hour.
An external stop valve will be outside the property, usually under the pavement or the front garden.
The sounds leaking water makes in a water line are the key to finding an underground leak. An external stop valve will be outside the property, usually under the pavement or the front garden. In most cases, the leak indicator is a small triangle (could be red, blue or white). When the pressurized gas finds a leak, it comes blowing out, producing a loud hiss.