Where is the piston and nut assembly located

Can you tell me exactly where the piston and nut assembly is located in this dishwasher? I have just a little standing water at the bottom of the tub and this sounds like the culprit in reading other member posts.

Thanks

nascar

It is located under the fine filter at the bottom back of the inside of the d/w. 4 screws hold the fine filter assy to the tub, remove it and the piston nut is in the center, unscrew it and you golden

Thanks for your quick response. :slight_smile:
nascar