This is a good question that depends on a number of circumstances. The easiest way to figure it out is to do them by hand for a month and then the next month, do them all in the dishwasher. Different dishwashers use varying amounts of water as well as people have different styles of washing by hand. Another way to save on the hot water bill is to make sure your water heater is well insulated and turn it down a few degrees.
It depends on what you are talking about if you are talking about washing dishes by hand and using a dishwasher i think a dishwasher if you are talking about shower or sink i think the sink.
Assuming you're running the dishwasher fully packed, then handwashing the same number of dishes would consume more water. Yet if you are running the dishwasher with not to much silverware it would save water to just hand wash them.
Using a dishwasher is faster and sometimes more cleaner than washing by hand. Hand washing saves money on energy because of drying, but it is time consuming. I prefer to use a dishwasher when I have a lot of dishes to do, but handwash if there are only a couple of dishes.
Dishwasher should only connect to the hot water line. Here is no additional heater for the water so tt should be the same temperature of the water boiler of the house.
Washing by hand uses less water, but more effort.
You have a problem with the pump, or a blockage in the drain.
a bathtub,washing machine,dishwasher,pop,soda,soapy water etc.
A dishwasher has a water heater and electric water pumps, which both consume energy.
It saves waste water backing up to or from the washing machine.
shower toilet washing hands dishwasher washing machine washing dishes (in sink) washing dog watering garden drinking cooking swimming pool bath
when you wash your dishes, with hot water and soap, and rinse them off in hot water,
The European brand dishwasher Bosch uses the least amount of energy washing.