On Mar 5, 3:39�pm, "Edwin Pawlowski" wrote:
wrote in message

ps.com...

I heat my water for washing *with natural gas. I have both a tank type
water heater and a tankless water heater. They both sit in the
basement under my living room. I can easily switch to either using one
of them or both of them to heat my water. During the summer the
tankless is sufficient for my needs but not in the winter when the
incoming water is very cold. Does it pay to completely drain the tank
heater during the warmer months of the year when I will not use it or
will it corrode more than with water in it?
Richard

I'd keep some flow going through the tank so it will not get all icky inside
from sitting. *IMO, it would be better to leave the water in it and just
turn the heat off of it.

In winter feed water: in from supply, tankless, tank heater, fixtures.

in summewr reverse this so incoming water first goes thru non heated
tank heater : in from supply, tank heater heater off, tankless,
fixtures.

just a few valves can do this easily. I would keep the water flowing
thru that tank at all times