Newbie and we’ve only been out twice. There’s a Corp campsite we intend to visit and there are water spigots every 2 or 3 sites. People have used splitters to share a spigot. There’s a dust-up now because this is no longer allowed. Is there a chance of contamination due to back-flow from a neighbors water line? Is it possible to run your pump while connected to a water supply? Wouldn’t this send water from your tank to your neighbor?