Product review (5 stars): Genuine Whirlpool part
I bought this from Appliance Tech, Inc. because they said, and another reviewer confirmed, that they ship only Whirlpool factory certified parts. The part says made in Mexico, but "Whirlpool Factory Certified" is stamped all over the box and the part itself. Of course it could be counterfeit, but I doubt anyone would really bother with faking it.

Appliance Tech got it to my doorstep in 2 days, even with free shipping. I'm impressed.

This part was an exact replacement for part number 2182106. Although it came with a kit of adapters to allow installation on almost any refrigerator, none of the extra parts were needed. The job took about 15 minutes. You can do it with just a screwdriver and pliers. The previous valve lasted 17 years before it started leaking.