PB-02Find your stopcock and check for cables and pipesBefore you drill anything, find your stopcock (usually under the kitchen sink) and check it turns, so you can shut the water off fast if you hit a pipe. Run a detector over the whole area, but don't trust it completely — detectors miss cables that are deep, in metal conduit, behind metal-backed plasterboard, or outside the usual safe zones. If you have any doubt at all, isolate the circuit at the consumer unit before drilling, and be ready to turn the water off at the stopcock before you cut into anything.