DC-04Check for cables and pipes before you drillCables and pipes can run almost anywhere, not just in the 'safe zones' — a detector helps but can 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 about what's behind the wall, isolate the relevant circuit at the consumer unit before drilling near it.