Disconnect tool - https://amzn.to/2Mab8vt

Here is a very quick little video to show you how to remove a sharkbite fitting with the tool or without the tool using an adjustable wrench.

A different way to remove sharkbite fitting without a special tool. This is helpful when you need to release a sharkbite fitting in tight space where the special tool won't fit. A strong zip tie and consistent pressure as you slide it off can get you of a jam in a tight space.