Where do I hook up the water line?

Refrigerator & Freezer Repair
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1

There are two lines, one that hooks up in the back and goes into a valve. The other is in the front, from underneath. I am not sure which one to hook the water line up to. What is the one in the front for? We have an ice and water dispenser in the door and that’s why we’re asking.

Thanks for any help.

2

where do i hook up the water to my frig (frigidaire)

3

It hooks up to the valve in the back.

Nat