Mom's Chicken Noodle Soup

1 Tbls. butter
1 c. chopped carrot
1/2 c. sliced celery
1 Tbls. flour
3 1/2 c. chicken broth
1 c. water
1/4 tsp. salt
1/4 tsp. pepper
2 c. uncooked wide egg noodles
1 lb. skinned, boned chicken breast, cut into 1-inch pieces
2 Tbls. parsley

Melt butter in a large soup pot over med-high heat. Add carrots and celery; sauté 3 minutes. stir in flour. Gradually add broth, water, salt, and pepper, stirring with a whisk; bring to a boil. Cover, reduce heat, and simmer 5 minutes. Add noodles and chicken, and bring to a boil. Cover, reduce heat, and simmer 10 minutes. Stir in parsley.