How do I turn off the water line to my refrigerator?

0:000:34How to turn the water supply off and on to your refrigerator - YouTubeYouTube

How do you replace a Whirlpool water line?

1:002:32Whirlpool Refrigerator Water Line Replacement #W10511930YouTube

Do you have to shut-off water to change fridge filter?

When the water filter is at the bottom or its side and not in the top sticking down, you should turn off the water. Once the water pressure is off it will release easily. Just make sure you get the correct filter for your fridge otherwise it will damage the water system.

How can you tell if a water valve is open or closed?

If the handle on top is parallel to the valve, its open. Likewise, if the handle is perpendicular to the top, the valve is closed. Common places you might find a ball valve are in irrigation and in sites where you need to control water supply from one area to another.