SR-03Check for cables and pipes before you drillCables and pipes can run almost anywhere in a wall, not just in the 'safe zones'. Use a detector, but still assume something could be there and drill carefully — detectors miss deep cables, ones in metal conduit, and anything behind metal-backed plasterboard. Find your stopcock (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.