WaterSupply tanks are sterilized prior to delivery through an extremely high-temperature molding process. Rinsing your tanks may be helpful but washing them prior to filling is not necessary. WaterSupply uses vacuum drills in the manufacturing process to minimize plastic shavings inside your tanks. To remove any shavings that may have fallen in during assembly you may use a vacuum or simply fill as normal then scoop the shavings off the top. Plastic shavings are harmless and will float on top of your water. Chlorine, chlorine tablets, and other substances approved for treating water may be used upon filling your tank to kill bacteria that may have appeared during delivery.
Cleaning steps are as follows:
1. Lay the tank on its side on a lawn or driveway. Make sure you don't smash the black fittings.
2. Take the lid off and spray water around the inside of the tank until you have a pool of water.
3. Pour a third of a cup of bleach in the tank and roll the tank back and forth to slosh it around to coat the inside.
4. Stand the tank up and let the water and bleach completely drain out.