Rinse the navy beans well. Add the beans, 8 cups water, and 1/2 teaspoon salt to your Instant Pot. Secure the lid and set the cooker to high pressure for 15 minutes.
Return the beans to the pot and stir to combine. Secure the lid and cook on high pressure for 25 minutes. Allow a natural pressure release, then open the lid and stir gently before serving.