Product review (5 stars): Took a while to figure out what the part was called and where to order it, only took 20 minutes to install
Exact part I needed.  Symptom was that top rack dishes were always gritty/dirty after a wash cycle.  Followed some YouTube video tutorials on how to disassemble the chopper assembly and noticed that my old checkvalve was damaged, had ripped in a way that partially occluded the outflow.  Ordered this part (took a while to figure out what this doohickey was called), replaced it  - you'll need an inexpensive Torx screwdriver set that has a T20 and T15 (maybe it was a T10?) driver.  Spouse and I both noticed the dramatic difference in the next load.  I saved us a $100 service call plus labor.  DYI FTW!