Put the water in a pot and bring it to a rolling boil.
Turn the heat off
Add the tea bags
Steep for about 15 minutes (longer if you want it stronger)
Stir in the sugar so it dissolves in the tea. Add a little at a time tasting as you go.
Remove the tea bags
Transfer the water to a pitcher
Let it cool to room temperature
Refrigerate for two hours before serving
Pour over ice