Pour water into 6 quart Instant Pot. Add in green beans, garlic, butter and salt & pepper to taste. 

Place lid on IP to lock position and make sure valve is set to sealed position.

Firm Crunchy Texture - Low Pressure 0 Minutes (Beans will steam while coming up to pressure)

For a little Softer Bean but still Firm - Low Pressure 2 minutes

For Soft Bean but not mushy - Low Pressure 5 Minutes 

Once time has elapsed, Manual Release or Quick Release (Carefully open the seal valve with a wooden spoon or tongs).

If using a steamer insert remove, place in serving bowl.  

When not using an insert, remove with tongs or slotted spoon and serve.

Pour water into medium size pot. Add in green beans, garlic, butter and salt & pepper to taste. Give them a stir. Bring to a boil. Reduce to simmer and cook for 30 to 40 minutes. Serve.