TSD-04Run your safety checks before you drillCables and pipes can run almost anywhere in a wall, not just in the 'safe zones', so use your detector but still treat the area as if something is there. Find your stopcock now, usually under the kitchen sink, and check it turns freely so you can shut the water off fast if you hit a pipe. If you have any doubt at all, isolate the relevant circuit at the consumer unit before drilling.