The most telling signs of a leak in the main water line are.
Water leak outside house.
One of the first places to look for signs of a leak outside your home is your water bill.
Turn off the main water valve of the house and look at the meter.
Common causes of this type of leak are broken sprinkler pipes improper drainage from downspouts or french drains or grading that slopes toward the house.
If it is moving the leak is between the valve and the meter or outside.
If it is not moving the leak is inside the house.
Water surfacing in the front yard.
Exterior below grade issues.
How to test for a main water line leak.
While your bill may not be exactly the same every month chances are that it generally stays within a certain range.
Testing for a main water line leak follows simple logic.
Did you find some water.
Water can drain along the outside of pipes in your walls or trickle many feet down the inside of your walls before the telltale signs of a leak become visible.
You will need to determine whether the leak is coming from your main water service to the house or your irrigation system.
If your leak is coming through at the lower level you may have exterior below grade issues.
Although water travels in the path of least resistance if the soggy spot is nowhere near your main water line there s a good chance the leak.
Turn off all water flow into your house and then see if the water meter is still reading a flow of water.
Signs of a water leak.
These are telltale signs of a water leak in the yard.