AB-03Check for cables and pipes before you drillCables and pipes can run almost anywhere, not just in the 'safe zones', so always use a detector — but treat it as a warning, not a guarantee. Detectors can miss cables that are deep, in metal conduit, behind metal-backed board, or confused by a metal stud frame. Find your stopcock (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 relevant circuit at the consumer unit before drilling, and turn off the water at the stopcock before drilling near any pipe run.