Make sure all ingredients are chilled prior to making.
Pour the thawed lemonade concentrate into the bottom of your beverage dispenser and add in 6 cups of cold water. (this is a little less water than the package will recommend).* Stir in the pineapple juice.
Just before serving add in the lemon-lime soda and stir gently to combine. Serve over ice if desired.
*if using prepared lemonade, do not add any extra water to recipe.