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