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As far as the pumps, motors, valves, and tub are concerned, these dishwashers are almost exactly the same. SHX5AV52UC is an Ascenta model and the primary difference between these less expensive Ascenta models is that they do not have a flood pan with a float device below the dishwasher to prevent your kitchen from getting flooded or floors being damaged if your dishwasher gets a leak. I would really keep looking for the SHX 3AR7(5) UC model, or any other Bosch model that isn't of the Ascenta line.
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