09/03/2026
Water leaks divide into two categories: the ones you can see and the ones you can’t. Visible leaks — a dripping faucet, a damp cabinet under the sink, water at the base of a toilet — are straightforward to find and usually straightforward to fix. Hidden leaks — inside walls, under slabs, in the crawl space, underground between the meter and the house — are the ones that cause serious damage because they go undetected for weeks or months while water accumulates where you can’t see it.
This guide covers three things. First, how to confirm you have a leak. Second, how to locate visible leaks step by step. Third, how to spot the signs of hidden leaks before they cause major damage.