SH-03Check for cables and pipes before you drillCables and pipes can run almost anywhere in a wall, not just in the 'safe zones'. Use a detector, but still assume something could be there - detectors miss cables that are deep, in metal conduit, behind metal-backed plasterboard, or outside the safe zones, and a metal stud frame confuses cheap detectors further. Find your stopcock now, usually under the kitchen sink, and check it turns, so you can shut off water fast if you hit a pipe. If you have any doubt, isolate the relevant circuit at the consumer unit before drilling.