[Shop-talk] Hot Water Heater 'Heat Trap'

[Randall]

> That's dishonest,

Yeah, about as dishonest as saying there is no difference between "has been
linked to" and "causes".

> The Romans knew lead was a poison.

Yeah, except they thought it was only poison in high concentrations.  That's
why they kept making things like water pipes out of lead, and all got lead
poisoning.

30 years ago we were still using lead in water pipes, because everyone
"knew" it was safe.

-- Randall