It is recommended that your fresh water tank be sanitized periodically using a chlorine solution followed by clear water rinses. Follow the steps below:

1. Prepare a chlorine solution by adding 1/4 cup of liquid household chlorine-based bleach solution to one gallon of potable drinking quality water.
2. For every 15 gallons of tank capacity, add one (1) gallon of the chlorine solution to the empty supply tank. (For example, a 30 gallon tank would require 2 gallons of solution.)
3. Fill the remainder of the tank with potable water.
4. With the water pump ON, open each faucet long enough for liquid to run out. This will remove all air from the water system and lines.
5. Allow the system (now filled with the chlorine solution) to stand for at least three (3) hours. Before performing the next step, provisions should be made to allow for drainage of all water from the fresh water tank.
6. Flush the piping by running water through faucets for at least one minute each.
7. Turn the water pump OFF.
8. Drain the tank and pipes by opening the tank drain valve. Open each faucet to permit water to drain from each pipe.
9. When the tank is empty and each faucet has been opened, drained, and closed, close the tank drain valve.
10. Fill the system with clear, fresh water.
11. Repeat steps 6 through 9.
12. Partially fill the system with fresh water. Check the tank and system for any chlorine taste or odor. If any traces of impurity remain, prepare a solution of one (1) quart vinegar in five (5) gallons of water and place in water tank. Fill the system completely. Agitate the system by moving the vehicle, then repeat steps 4 and 5.
13. Repeat steps 6 through 9 to empty the system.
14. If the system is to be used, fill with fresh water. If not, the system is ready for storage.

To help prevent algae and bacteria in your fresh water system, always drain the system (including the water heater) when not in use.