GE Profile 28 Owner's Manual page 35

Route the Copper Tubing and Connect It to the Shutoff Valve
Route the copper tubing between the cold water line and the refrigerator.
Route the tubing through a hole drilled in the wall or floor (behind the
refrigerator or adjacent base cabinet) as close to the wall as possible.
Be sure there is sufficient extra tubing [about 8 feet (244 cm) coiled into 3 turns of about
10 (25 cm) diameter] to allow the refrigerator to move out from the wall after installation.
Place the compression nut and ferrule (sleeve) onto the end of the tubing and
connect it to the shutoff valve.
Make sure the tubing is fully inserted into the valve. Tighten the compression
nut securely.
Saddle-Type Shutoff Valve
Turn On the Water and Flush Out the Tubing
1 Turn the main water supply on and flush out the tubing until the water
is clear.
2 Shut the water off at the water valve after about one quart (1 L) of water has
been flushed through the tubing.
Compression Nut
Packing
Nut
Ferrule (sleeve)
Outlet Valve
35