What do you mean by dual zone dishwasher? There's a model or two of WP that have top rack only and numerous KitchenAids with top rack only. My KitchenAid- produced Kenmore Elite has top rack and bottom rack only options. Only a couple of Kenmore Elite models offer this, none thus far offer bottom only option in KitchenAid or WP lines. There's a new Kenmore Elite dishwasher that's produced by LG. The rest are KitchenAid products.
