RB-02Check for cables, pipes and your stopcockRun a cable and pipe detector over both marked points before you drill anything. Even with a clear reading, treat the wall as if something could still be there — detectors miss deep or shielded cables. 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, isolate the relevant circuit at the consumer unit before drilling.