On Mon, 08 Aug 2011 16:05:27 -0700, Erik wrote:

In article
,
engineman wrote:

I have to replace my water heater because of an unrepairable leak in
the gas valve.
I have a tank-type heater and am thinking of replacing it with a
tankless.
One problem is that my present heater has it's water connections at
the top and the tankless at the bottom underneath.
To make installation easier I'm thinking of using flexible
corrugated copper tubing similar to what is used for gas lines.
I'm wondering if I will run into any problems with this, such as
galvanic action, also will the corrugations restrict the water flow
too much?

Engineman

Recently I was also considering a tankless water heater... and as I had
zero experience and knowledge of them, solicited thoughts and comments
from the group.

The general consensus was to not walk, but RUN from them, just as fast
and far as you can... lots of real world trouble, maintenance and
expense...

A word to the wise is sufficient, and I followed that advise... and am
pleased to to announce that everything is once again 'ponies and
rainbows' here.

May I suggest you also do your homework before considering such a
heater... it was very eye opening.

Good Luck!

Erik
Like Erik, I looked into a tank less gas fired water hater and found
that the installed price would be ~$4500.00 as opposed to $1275 for a
40 gallon tank unit including installation of a SS flue liner.
Further, I had experience in April while visiting senior son in Spain,
his tank less butane fired unit sucked big time in that a shower
involved having someone watch the pilot light and relight it every
time it went out. I suspect that was a problem unique to the
particular unit rather than being a general fault but it sure made a
shower into an event to be endured.
Gerry :-)}
London, Canada