CR-03Check 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, or behind metal-backed plasterboard, and a metal stud frame can confuse a cheap detector further. Always assume something might be there until you've proved otherwise. 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.