I got a question. In a 20flat I inspected yesterday, I saw a grounding wire being bonded to a cold water pipe supplying a water heater. The wire was attached about 3.5 feet away. First of all, is it OK? Second, should hot, cold and gas piping at the water heater be bonded together. Is jumper necessary? It’s just I’ve never seen this kind of grounding to a water pipe.