Pour the water into the pressure cooker pot.
Place the chicken wings into a 7-inch, oven safe colander or steam rack. *see notes
Using the trivet, lower the wings into the pressure cooker pot.
Make sure the wings do not exceed the max fill line on the pot.
Place the lid on the unit and turn to locked position.
Turn the steam release valve to sealing.
Press the manual button and adjust the timer for 15 minutes.
Once the unit has finished cooking and the timer has counted to zero, carefully release the steam.
Remove the wings from the pot, using towels and the trivet handles.
Place the wings on a baking sheet or into a foil pan.
Crisp the skin up by placing the wings on the highest rack, under the broiler in the oven on high for 3 to 5 minutes, until desired result is achieved.
In a large bowl, combine the melted butter and hot sauce.
When the wings are finished crisping up in the oven, toss them in the sauce mixture to coat.
Serve hot with celery and ranch or blue cheese dip.