https://youtu.be/jd8KZNnhTEs
This tell you how to add freon to a fridge. You use a piercing valve. If you do this, make sure the valve you order has the little gasket already fitted on the valve. I ordered one and it had a gasket that you had to put on yourself and I didn't like that so I found the exact one that is in this video.
Sent from my SM-N950U using Tapatalk