Appliance store says I need a shutoff valve behind the refrigerator. They want a valve box in the wall to attach their flexible water line. The plumber put in flexible copper tubing with the shutoff valve under the sink. Appliance store says that's against code. I live in California if that makes a difference. The copper tubing is the smooth type. The refrigerator is a LG French door.
Most appliance installers' policy dictates that their installers CANNOT attach to refrigerator water lines to any supply that can't be shut off at the refrigerator area,i.e. not in cabinets or opposite walls etc. It has to do with liability of potentially causing water damage by crawling in a sink cabinet or similar, or other areas. The dishwasher install is an exception for obvious reasons. That is the case for appliance installers contracted by Lowes and Home Depot. They are not trying to match CODE but it works out that way and it is an easier reason to share with customers.