SH-04Check for cables and pipes before you drillCables and pipes can run almost anywhere, and a detector can still miss them if they're deep, in metal conduit, or hidden behind old repairs — this wall also has radiator pipework running through it, so take extra care. Sweep the detector over the whole line again, but treat the result as a guide, not a guarantee. Find your stopcock now, usually under the kitchen sink, and check it turns so you can shut off water fast if you hit a pipe. If you have any doubt about what's behind the wall, turn off the relevant circuit at the consumer unit and the water off at the stopcock before you drill.