Preheat oven to 325F. Prepare a loaf pan by spraying or greasing it.
Mix sugar, flour, baking soda, baking powder, salt, and pumpkin pie spice in a large bowl until combined.
Place butter in a microwave safe bowl. Place bowl in microwave and cover bowl with a small plate. Heat butter at 50 percent power until melted, 30 to 60 seconds.
Add the water, pumpkin, and eggs to the melted butter. Beat well.
Add wet ingredients to dry ingredients and stir until just combined. Do not overmix.
Pour into the greased 5 x 9 inch loaf pan. Add a sprinkle of brown sugar on top if you like.
Bake for 75 minutes. Insert a wood skewer to confirm that it's done and remove from the oven.
Cool for fifteen minutes and then turn out onto a wire rack.