In a large skillet, cook bacon over medium heat until crisp. Remove to paper towels with a slotted spoon to drain. Saute onion in drippings for 1 minute. Add sausage; cook until lightly browned. Add potatoes; cook 2 minutes longer. Drain.
Transfer sausage mixture to a 3-qt. slow cooker. In a small bowl, combine the soup, sauerkraut, water, vinegar, sugar, salt and pepper. Pour over sausage mixture. Sprinkle with bacon. Cover and cook on low for 6-7 hours or until potatoes are tender. Yield: 5 servings.