Put 8 cups of water in crockpot (mine is a 5 quart).
Slice kielbasa 1/2" thick slices and the cut slices into quarter pieces.
Chop onion into small pieces.
Add the kielbasa, onion and other seasonings to crockpot and set to high. Once the mixture starts to simmer, reduce heat to low setting for an hour.
Peel potatoes and cut into 1/2" chunks (you can cut them bigger, but remember to adjust the cooking time). Add to crockpot after the hour of low heat cooking of the last step. Add one teaspoon of salt and stir.
Return crockpot setting to high. Cook until potatoes are cooked through, about 1-1/2 hours depending on your crockpot.
In a skillet, melt the butter and add all the flour at once. Stir constantly over medium heat for about 5 minutes. Whisk in the cup of milk until blended thoroughly. Remove from heat.
Stir in well to the soup, let cook for another 1/2 hour in the crockpot.
Soup is on! Enjoy!
Note: I am a huge fan of Tastefully Simple products. You can also use 3 Tablespoons of the Onion Onion seasoning in place of the onion.