Phyn Plus will detect leaks in your water delivery system such as pinhole leaks, drip leaks, pipe bursts, toilet flapper leaks, and leaks in supply-line hoses to clothes and dishwashers. Phyn will also alert you if water has been running longer than normal. Phyn will not catch roof leaks and leaks or stoppages in outflow lines (e.g. a clogged sink or sewer line).