CR-04Check for cables and pipes before you drillRun a detector over the marked spots, but don't rely on it completely — detectors miss cables that are deep, in metal conduit, or outside the usual safe zones near sockets and switches. Find your stopcock now (usually under the kitchen sink) and check it turns freely, so you can shut off the water fast if you hit a pipe. If you have any doubt at all about what's behind that wall, isolate the relevant circuit at the consumer unit before you drill.