AB-04Check for cables and pipes before you drill properlyA detector helps, but it can still miss cables that run deep, sit in metal conduit, or lie outside the usual safe zones near sockets and switches. Before you drill any further, 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, turn off the relevant circuit at the consumer unit, and turn the water off at the stopcock before drilling on.