In reply to message posted by Harold Kestenholz:
You can see from the disclaimer above, that Aussies can recommend scalding temperatures like 66C and get away with it. North American plumbers have to tell customers to use mixing valves to bring the fixture temperature down to civilized temperatures because the US government makes standards in Fahrenheit. 151F is too hot to run onto people by many state code officials (and even common sense.)
Harold dear Harold my man, Check this out.
According to health department rules WHICH the NYC Master license test is given we professionals know the folowing HEALTH
Domestic water to a residencial dishwasher 140 BUT this is no longer possible thanks to people not taking personal responsibility.
People are to stupid to know hot water burns
Water to a commercial dishwasher shall be 140 -160 degrees F for washing and 180 for sterilization IN LIEU of chemicals.
The colder the water the more chance of someone getting seriously sick BUT Lawyers are the ones writing the new codes it would appear