No, the idea isn’t to use more water, this double dishwasher lets you use less so you can do those small loads and save water by using two independently controlled drawers. By using only one drawer you can save half the energy and water of a normal cycle while still getting those dishes done when you want them done. The Fisher & Paykel DD603SS dishwasher let’s you separate delicate items into a separate drawer from pots and pans and run on a different cycle.

The unit runs water through the detergent and dissolves it evenly before it enters the dishwasher creating less spotting. It’s Energy Star approved and has several water-saving wash cycles. Water conservation can be significant, with this double dishwasher using as little as 2 gallons of water per drawer (old school dishwasher can use up to 8 gallons of H20). Ergonomically superior sliding drawers save space, have fewer moving parts and look great. When you adjust the cycle this model actually adjusts the water pressure, unlike many conventional dishwashers which only change duration time. On the Integrated model you can choose a finish to match your kitchen decor.
fisher & paykel

fisher & paykel store locator (it’s carried at many Home Depots)

AJMadison for example of particular model and cost info.