WS-02Check for pipes and cables before you drillCables and pipes can run almost anywhere in a wall, not just in the obvious zones. Run a cable and pipe detector over your marked points, but still expect something to be there — detectors can miss deep or shielded cables. 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 about what's behind the wall, isolate the relevant circuit at the consumer unit before you drill.