IB-03Check for cables and pipes before you drillCables and pipes can run almost anywhere in a wall, not just in the usual safe zones. Sweep the area with a detector, but still treat the wall as live until you prove otherwise, since detectors miss cables that are deep, in metal conduit, behind metal-backed plasterboard, or confused by a metal stud frame. 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, isolate the circuit at the consumer unit before drilling, and turn off the water at the stopcock before cutting into anything that could carry water.