AB-05Safety check before you drillCables and pipes can run almost anywhere in a wall, not just in the zones you might have heard of. Use a cable and pipe detector, but still treat the wall as live until you prove otherwise - detectors miss deep cables, cables in metal conduit, anything behind metal-backed plasterboard, and a metal stud frame can confuse a cheap detector further. Find your stopcock (usually under the kitchen sink) and check it turns before you start, so you can shut off the water fast if you hit a pipe. If you have any doubt, isolate the circuit at the consumer unit before drilling.