RB-02Check for cables and pipes before you drillSolid brick and block walls can carry cables and pipes almost anywhere, not just near sockets and switches. Run a detector over your marked line, but don't trust it completely — detectors miss deep or shielded cables, so still drill with care. Find your stopcock (usually under the kitchen sink) and check it turns before you start, so you can shut off water fast if you hit a pipe. If you have any doubt at all, isolate the circuit at the consumer unit first.