In a large, heat-proof pitcher/jug, combine the boiling water, baking soda & sugar mix well to dissolve the sugar. Add the tea bags and let steep for 10 minutes.
Remove the tea bags.
Add the peach nectar and fill the rest of the pitcher/jug with cold water. Refrigerate until chilled.
Add sliced peaches and ice to tall glasses and pour the tea over the ice and peaches to serve.
Notes
A 2.5 to 3-quart pitcher would be ideal for this recipe to ensure there is enough room for mixing and serving without spilling.