How Do You Check for Slow Plumbing Leaks at Home?

The water meter is your first clue. Locate it, usually in a box near the street or in your basement. Close every faucet, including the washing machine valves and toilet fill valves. Record the meter reading, then wait two hours with no water use anywhere in the house.

Check the meter again. If the numbers changed or the low-flow indicator spun, water is moving through your pipes somewhere. That means a leak. If the meter stayed still, the leak likely lies in a fixture or appliance that uses water intermittently, like a refrigerator ice maker.

Your monthly water bill can reveal a slow leak. Compare your usage over several months. If you see a steady rise with no change in household habits, that extra water is going somewhere. Many utilities show daily usage online, which helps spot unusual patterns.

Keep a simple log for a week. Note how many loads of laundry, showers, and toilet flushes happen each day. If your meter reading shows more water consumed than your log explains, a leak is likely. This method catches leaks that are too small to see or hear.

If you cannot find the leak but your meter test says water is moving, the problem may be inside a wall, under a concrete slab, or in the main line. These hidden leaks can cause serious damage over time, including mold growth and structural issues. In Chapel Hill, the humid climate can speed up mold development once moisture is present.

Local water damage pros have specialized tools like acoustic listening devices and thermal imaging to locate leaks without tearing open walls. If you suspect a slab leak or hidden pipe issue, consider scheduling a water damage inspection. Acting quickly can save your floors, drywall, and foundation from costly repairs.