Pumpkin Soup with water

6 lbs pumpkin , perferably a sugar pumpkin 3 tablespoons unsalted butter 1 onion , sliced thin 2 carrots , grated course 2 cups chicken broth 3 cups water ,[...]

2 cups chopped celery 2 cups chopped carrots 4 cups chopped onions 3 pieces garlic , minced 2 (30 ounce) cans libby's pumpkin pie filling 2 tablespoons pepper[...]