Common Household Leaks
Leaks frequently occur around shutoff valves, faucet supplies, toilets, water heaters, dishwasher connections and exposed piping. Rural homes may also develop leaks around pressure tanks, well-system fittings or other components involved in supplying water to the house. At cottages, seasonal piping and outdoor connections deserve additional attention because freezing can damage a fitting without showing itself until the system is turned back on.
A slow leak can sometimes cause more hidden damage than a dramatic one because it can continue unnoticed for weeks. Swollen cabinetry, stained drywall, peeling paint, unexplained moisture or a musty smell can all be signs that water has been present longer than expected.
Leaks on Well-Water Systems
Homeowners with private wells sometimes get an additional warning sign: the pump starts running when nobody is using water. A pressure system should normally remain stable when all fixtures are closed. If the pump repeatedly needs to restore pressure, a leak or another problem in the water system may be allowing pressure to fall.
That does not automatically prove a hidden pipe is leaking, but it is useful information when diagnosing the system.
Frozen Pipe Leaks
Frozen plumbing deserves special attention because the visible leak can be delayed. Water expands as it freezes and may split or weaken the pipe. The ice can then act as a temporary plug. Once the pipe warms and the blockage melts, the damaged section becomes pressurized and water begins escaping.
If a pipe has recently frozen, continue checking the surrounding area even after normal flow returns.