EP-05Find your stopcock and check the circuit before you drillBefore drilling into any wall, find your stopcock (usually under the kitchen sink) and check it turns, so you can shut off the water fast if you hit a pipe. Use a cable and pipe detector along the drilling line, but still assume something could be there — detectors miss cables that are deep, in metal conduit, behind metal-backed plasterboard, or outside the normal safe zones, and a metal stud frame confuses cheap detectors further. If you have any doubt at all, isolate the relevant circuit at the consumer unit before drilling, and turn off the water at the stopcock before cutting into anything that could carry water.