SB-04Check for cables and pipes before you drillRun a detector over the marked area, but don't trust 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 water fast if you 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.