1997 chevy cavalier transmission
soldered copper pipe is still used in high pressure systems also for gas when run in to a house etc but the use of it is dying out as more advanced plastics come in to the building trade but copper is still the choice for gas as is has high temp resistance
A lot of the noise comes from the front of the dishwasher. Putting a blanket around the dishwasher won't decrease the noise very much at all. Not a fire hazard either. The ultra quiet dishwashers are of a different design.
why not just stuff regular insulation in there first.