Lightly spray the crock of a slow cooker with nonstick cooking spray. Set the temperature to low.
Rinse and sort the dried beans to eliminate any bad beans or foreign debris.
Add the celery, carrot, onion, and ham to the slow cooker. Pour the beans on top. Add the water. Add the pepper. Cover and cook on high for 5 to 6 hours or on low for 8 to 10. (See blog post about cook time.)
Once tender to your liking add the ham seasoning packet and salt to taste. For us, it's about 1 teaspoon of salt.
For a creamy broth, stir vigorously, pressing some of the beans against the side of the crock to mash them up. Stir to combine.
