It’s ironic because it’s not even dirty water, it’s just nonboiled water from a farmhouse pump. If the faucet/kitchen can only pull water from Clean Water tanks that’d be a little silly, you can store all sorts of stuff in tanks, a majority of them stuff you may want to actually drink. In the very least any water should get hooked up, certain sources don’t require boiling and just show the basic water tag despite being clean and these sources are the easiest way to actually fill a vehicle tank.