On 7-Oct-2005, wrote:

So, the water is back to ambient temp after running through the first
few feet of pipe?

No the water will return to ambient temp if it sits in the pipe for a
while.


And it isn't going to make hot water show up any faster,

It will reduce by the amount of time taken to empty the pipe that
has been insulated. That isn't great, but the amount of water wasted
while folks wait for hot water represents a significant fraction of
the total amount of water wasted in homes.

Mike