On Mon, 8 Aug 2011 13:34:41 -0700 (PDT), 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

I just replaced my gas water heater after 23 years. Tankless too
exspensive. Went with another tank style. Tankless also have a
limited temp rise, so if you got real cold water goingin you might
only get warm coming out. All depends on input water temp and flow
rate. IE how many people are using hot water at the same time.

Copper to steel is not that bad in my experiance. Just as long as
there is no aluminum in there anywhere. My old and new tank style
heaters have galv. steel nipples pre installed that connect to copper
pipes. They have plastic liners in them and I guess that makes them
"dielectirc"

Remove 333 to reply.
Randy