If your RV doesn't have a built-in fresh water tank, you'll need to add one before you can start using it. Here's how to do it:
1. Find a spot for the tank that is level and easily accessible. You'll need to be able to reach the fill port and hose connections.
2. Place the tank on blocks or something similar so that the bottom of the tank is about 12 inches off the ground. This will allow gravity to do its job when you're ready to use the water in the tank.
3. Connect a garden hose to a clean water source and then open the valve at both ends so that water can flow freely into the tank. Fill it until it reaches just below the overflow valve, which is usually located near the top of the tank.
4. Close both valves and disconnect the hose from both ends. Your RV fresh water tank is now full!