How to Remove Calcium Deposits From a Water Tank in a Camper

1). Drain the camper water tank by connecting a garden hose to the bottom valve and allowing the water to run out of the camper.
2). Flush with fresh water to remove loose calcium deposits from the bottom of the tank. Connect a garden hose to the fill valve on the tank, and turn on the water to flush out the system, leaving the second hose outside the camper to divert runoff to the ground.
3). Close the valves on the tank, and add 6 gallons of white vinegar to a 40-gallon tank or 10 gallons for larger tanks.
4). Fill the rest of the tank with fresh water, and then close the valves.
5). Let the acid in the vinegar loosen and dissolve calcium deposits inside the tank for at least 48 hours.
6). Drain the tank completely, then reconnect the garden hoses and flush thoroughly to remove the loosened and dissolved calcium deposits as well as any residual vinegar taste and odor.
7). Fill the tank with fresh drinking water, and add mineral softening tablets based on the tank capacity and water hardness in your area.