KitchenAid KD21 and 22 dishwasher pumps vs whirlpool, power, clean pump assemblies.
There’s not much similarity between the KitchenAid pump design and the whirlpool power, clean pumps, on the power clean pumps. All water is forced through the grinder as it’s recirculated, and all the water goes through the separation chamber, where particles are centricallyseparated out.
On the KitchenAid system, you still have a filter and a small trap to keep food chunks out of the whole system that has to be cleaned manually.
The KitchenAid system did have a fine mesh filter, which the second generation of power clean pumps also had, this was added to the second generation power clean pumps so they could reduce the number of water changes.
The KD 21 and 22 dishwashers did not clean nearly as well as the whirlpool power clean machines once whirlpool bought KitchenAid. We were actually pulling brand new KitchenAid dishwashers out of peoples homes and replacing them with whirlpool power clean machines because they were so disappointed with the cleaning performance of the KitchenAids. The KitchenAid design was just too stingy with water and one final rinse just doesn’t cut it in a dishwasher even today that doesn’t work, KitchenAid also did not give positive water heating where the entire load of dishes would reach 140° or more while washing and then wild Doing the final rinse so drying performance was worse on the KitchenAids.
The KitchenAid’s were very well built dishwashers and could have a long lifespan. They just never have the great performance of other dishwashers of the time.
GE’s top-of-the-line machines and Maytag reverse rack, dishwashers whirlpool and Kenmore power, clean machine machines and a few of the foreign machines like ask go all left KitchenAid in the dust for performance.