Install a new three way shut off valve onto the existing hot water supply line.
Water to dishwasher hot or cold.
Reconnect the hot water supply line to the new shut off valve.
Hot water commonly is more effective for cleaning the dishes and coupled with the heat cycle of the dishwasher can sanitize the dishes.
This is why for dishwashers its always the hot water supply line.
Dishwashers do not have a cold or warm cycle like a washing machine.
Either in red or blue or with a red stripe or blue stripe.
I m not able to emphatically say that connecting a cold water hose to a hot water supply is running any risk.
But fill hoses have always come as either hot or cold.
For fastest possible wash times yet higher energy consumption connect the dishwasher to a hot water source.
Obviously both are correct but which one do i want.
Dishwashers are connected to the hot water line which allows the dishwasher to wash with the hottest possible water.
Depending on your house plumbing some hot water pipes give too hot water.
If you do connect a dishwasher to the hot supply you should use a hot fill hose which is designed for use with hot water.
The dishwasher may need to heat this water electronically anyway wasting further energy.
Use a wrench to remove the existing shut off valve on the hot water supply line under the sink.
Connecting to gas hot water works best with gas storage hot water systems rather than instantaneous systems.
The installer said he hooks all his up to hot.
Shut off the water to the kitchen sink.
The pre heater supplements the water coming in from the hot water line don t think you can hook it up to the cold water line and rely on the pre heater.
Steps for installing a new dishwasher.
For lowest energy consumption and the gentlest washing of china and crystal connect the dishwasher to a cold water source.
The dishwasher pre heater brings it up to a higher temperature allowing the detergent to work at its best.