Melt butter in saucepan. Stir in flour to form paste. Add water, granulated sugar, and brown sugar. Bring to a boil. Reduce temperature and allow to simmer.

Place the bottom crust in pie pan. Fill with apples mounded slightly. Cover with lattice work of pie crust. Gently pour sugar and butter mixture over the crust.

Bake 15 minutes in oven on 425. Reduce temperature to 350 and continue to bake for 35-45 minutes, until apples are soft.