When I was running new lines from my basement water heater,
I used a half inch line to the tub, and 1/4" lines to the separate
fixtures such as toilet, cold faucet, hot faucet. With each line
coming from the water heater, rather than branching off at the
bathroom.
It resulted in being able to have the toilet be flushed without
causing the shower to get hotter, and the hot water shows up
a lot quicker to the faucet. After all, it's an issue of clearing
out the cooler water, and with less volume, it takes less time.
With the smaller orifices of water-conserving fixtures, I've not
seen a problem with inadequate volume for tooth brushing, etc.


On Oct 14, 7:51 pm, Don Wiss wrote:
On Sun, 14 Oct 2007 00:12:38 -0700, Aaron Fude wrote:
I have a three story house with a water heater in the basement. I go
to the bathroom on the top floor to brush my teeth. It takes about 30
seconds or more for the water out of the faucet to become warm. Is
there a robust solution that would shorten that time to about 5
seconds?

Here's a small heater for under the sink that you could use:

http://www.clage.com/produkte/Produk...aschbecken.php

Don www.donwiss.com (e-mail link at home page bottom).