AB-04Check for cables and pipes before you drillRun a detector over every mark, but don't trust it completely - detectors miss cables that are deep, in metal conduit, behind metal-backed plasterboard, or outside the normal safe zones, and a metal stud frame can confuse a cheap detector even further. Before you drill anything, 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 circuit at the consumer unit before drilling, and turn the water off at the stopcock before cutting into anything that could carry water.