KH-03Find hidden pipes and cables before you drillCables and pipes can run almost anywhere, not just in the 'safe zones'. Use your detector, but still assume something is there until you prove otherwise — detectors can miss deep cables, cables in metal conduit, anything behind metal-backed plasterboard, and metal studs can confuse cheap detectors further. Before drilling, 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 relevant circuit at the consumer unit before drilling.