"Robert Green" wrote in message
...
I am wondering if prolonged cold spells substantially reduce the
temperature
of the water entering a house from the city water service . . .

. . . and if that's true, does that temperature drop translate into
increased stress on water heaters?
Bobby G.

If the water heater has to operate longer to bring the incoming water up to
temperature translates into " increased stress", then so be it. But that's
how it is supposed to work.
MLD