KR-03Check for cables and pipes, and know how to stop themRun your detector slowly over each marked point. Cables and pipes can run almost anywhere, and detectors miss deep cables, ones in metal conduit, or anything behind metal-backed board, so treat every hole as if something could be there. Find your stopcock now, usually under the kitchen sink, and check it turns before you drill. If you have any doubt at all, isolate the relevant circuit at the consumer unit and turn off the water at the stopcock before you drill near a socket, switch or pipe run.