Good stuff, Scott! Just wanted to dial in on one thing...
However, since not all water pressure levels are equal, they also added the float so that when it floats up the switch will open and kill power to the valve if the water pressure in the home is good enough to fill the unit faster. This allows a unit to fill to the same level regardless of the water pressure in the home.
This may be true for high pipe pressure situations but what about the more common event: a fill valve where the inlet screen is clogged with sediment? The float switch would never come into play here because the basin would be drastically underfilled (from the timed fill) resulting in wash pump starving and poor wash performance. Up here in rural New Hampster where almost everyone is on a granite-sucking well, this is single most common reason I replace valves in both dishwashers and washing machines.
Unless it's a case where the dishwasher fill valve froze and split...
