PLR-03Check for cables and pipes before you drillRun a cable and pipe detector over the marked spots, but don't trust it completely — detectors miss cables that are deep, in metal conduit, or outside the usual safe zones near sockets and pipework. Find your stopcock, usually under the kitchen sink, and check it turns freely so you can shut the water off fast if you hit a pipe. If you have any doubt about what's behind the marks, isolate the nearby circuit at the consumer unit before drilling.