MK-04Do your safety checks before you drillCables and pipes can run almost anywhere, not just in the 'safe zones'. Use your detector, but still treat the wall as if something is there until you've proved otherwise — detectors miss cables that are deep, in metal conduit, behind metal-backed board, 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 the water off fast if you hit a pipe. If you have any doubt, isolate the relevant circuit at the consumer unit before drilling.