Mince the ginger. Put in a saucepan along with 4 cups of filtered water.
Bring water to a boil. After water is boiling, turn down to a simmer; cover pot and let steep for at least 10 minutes.
Pour the ginger water through a strainer over a half-gallon pitcher; squeeze ginger solids to release liquid.
Stir in 1/4 cup of honey until dissolved.
Add 1/4 cup of vinegar and fill the pitcher almost to the top with filtered water.
Taste. Add more vinegar and honey if you desire a stronger drink.
Chill gingerade thoroughly. The ginger flavour will deepen as the drink chills.