Once again we are the victim of protecting us from the few idiots who are without common sense. This setup is no different than just about every fuel level device in gas tanks of every vehicle out there. I've replaced the fuel level/fuel pump in my van a couple of times. It has electrical wires, a pump and a rheostat connected to a float all exposed to the gas in the tank. I asked, how is this possible and how is it safe? Because of a simple principle, gasoline and gasoline vapors cannot ignite in the absence of oxygen.