Clean and sanitize all bottling equipment according to information below. Shake Root Beer Concentrate well. Mix with sugar in a large container. (DO NOT USE ALUMINUM). Stir in spring water.
Dissolve yeast in 1 cup pre-boiled water. Allow yeast to dissolve undisturbed 10 to 15 minutes. Add to sugar mixture and stir well.
Bottle immediately into plastic bottles, leaving 2-inch space at top of bottle. Cap tightly. Store each bottle on its side in a warm place (70° to 80°F) for 1 to 2 days, then store upright in refrigerator at 40° to 45°F for additional 3 to 4 days. Keep refrigerated and consume within 7 to 8 days.