Product review (5 stars): It worked. No more leak. Update: the unit died.
The valve (rubber tube) is the critical part. It takes less time to repair than you think, once you locate two screws at the bottom of the front cover and two for the top cover.

Parts worked, but a few months later the Whirlpool's tub seized. My wonderful repair person did not charge me. Replaced it with a very nice large Speed Queen with mechanical controls instead of failure-prone digital controls.