CH-03Check for pipes and cables before you drillRun the detector over each mark, but still treat the wall as if something is there — detectors miss deep cables, metal conduit, and anything behind metal-backed board, and a metal stud frame can confuse a cheap detector completely. Find your stopcock now, usually under the kitchen sink, and check it turns, so you can shut the water off fast if you hit a pipe. If you have any doubt, 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.