On Jun 6, 10:31*pm, "Ed Pawlowski" wrote:
"Ron" wrote

Then perhaps you can explain to me while during the summer (expect at
night) when I turn on the cold water I get warm and then HOT water? I
have to let it run for over a minute just to get cool water. My
neighbors that don't had direct shade on their roofs from trees have
the same problem. A friend of mine that had his house re-plumbed (so
his pipes are now in his attic) has the *same* problem.

Attics are not heated or cooled to house temperature. *In summer, they
become solar heaters so the water gets rather warm. *

Thanks for making my point after you wrote this "I suggest you read
about the laws of physics and heat transfer. Heat energy
will always seek out the lower temperature and the AC is removing heat
from living spaces. Look up equilibrium."

In the north, you'd
never plumb a house that way because the pipes could freeze in winter.

In the north, if you need to have your house replumbed, how else is it
going to be done w/o running the pipes in the attic?