The problem is so bad that your Airstream's auto-destruct system has been armed. LEAVE NOW!!!!
Just kidding. I believe it means your fresh water TANK is empty. You only need the tank when you are camping without hookups. You should be able to fill it from your full-hookup site. No reason to unless, like me, you travel with small children in constant need of a potty while enroute to the campsite.
Or you can leave the tank empty and keep a jug of water in your bathroom. I have a 4 year old and 2 year old - we always travel empty.
That said, some on the forums have said that their larger airstreams (25'ers and up) tow better with a full freshwater tank.
My six & seven year-old Boyz picked up on turning the water pump switch on fairly easy. Lots easier than doling out a big jug of water.
That said, my 26' Airstream used to tow better with a full tank of water. Once the weight distribution bars were fine-tuned, travelling with a full tank was not necessary.
This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.