Product review (3 stars): No need to pay for the partWhirlppol will provide one free, but you'll have to install it.
I purchased a Whirlpool Gold model in December 2011 affected by the design flaw this redesigned drain addresses. In attempting to get Whirlpool to cover labor as well as the part sold here, I ran into a brick wall. The customer rep and supervisor I spoke to both acknowledged that numerous models and customers have been impacted, but since the issue is not one of safety, no recall is planned. I was told Whirlpool would cover labor for up to two years after purchase, but not beyond that time frame. I argued that had I been aware of the problem at the time the original Service Pointer W10632338 was issued in August 2013, I would have sought repair then and not been charged for installation labor. But since consumers were not informed of this widespread flaw, I had no way to know that. My argument fell on deaf ears.

Though some folks have posted comments that installation is easy and fast, a video I watched indicates it's a substantial jobat least on my model.

You'll find details on the drain tube kit at https://docs.google.com/file/d/0BzIiBNwRIV4NNWJNNmx0andROGs/edit

In shopping for appliances in the future, Whirlpool, KitchenAid, Jenn-Air, Maytag and Amana won't be considered if I can avoid those brands since it's clear the manufacturer is unwilling to do the right thing when defective designs are discovered.