Overview Water in the outback is liquid gold, so set up your vehicle with an Ironman 4x4 Water Tank.The Ironman 4x4 20L Plastic Jerry Can Water Tank is built tough from food grade, BPA free, UV Stabilized Polyethylene ensures you can enjoy clean, taste free water. Keep one handy in the back of the vehicle and with the integrated tap have a drink of H20. All Ironman 4x4 water tanks are pressure tested with water at the factory. A small amount of water inside the tank is normal. Ironman 4x4 recommends cleaning your water tank before use. Refer to instructions for cleaning procedures.