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Posted by Luca on July 26, 2008, 3:31 pm
Is it safe to shut off the main water valve to a house, and put the
water heater on "Low"? We will be leaving the house unoccupied
indefinately.
My concern is the the water evaporating in the 40 gallon tank, and the
tank being damaged. How long before I need to worry that this will
happen with water shut off?
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Posted by dpb on July 26, 2008, 3:32 pm
Luca wrote:
> Is it safe to shut off the main water valve to a house, and put the
> water heater on "Low"? We will be leaving the house unoccupied
> indefinately.
...
Just turn the water heater completely off...there's no reason if the
house is unoccupied to leave it on. When cold weather arrives, need to
arrange for not freezing any standing water, of course, ...
--
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Posted by Wayne Boatwright on July 26, 2008, 3:40 pm
On Sat 26 Jul 2008 12:31:43p, Luca told us...
> Is it safe to shut off the main water valve to a house, and put the
> water heater on "Low"? We will be leaving the house unoccupied
> indefinately.
>
> My concern is the the water evaporating in the 40 gallon tank, and the
> tank being damaged. How long before I need to worry that this will
> happen with water shut off?
Do you live in a climate where there are freezing winters? For more
reasons than one, you should leave your furnace set to at least above
freezing, say 40-45 degrees F. In that case, I would simply turn the tank
off altogether.
If you don't plan on leaving the furnace on, you should turn off the tank
and drain it, as well as drain as many interior pipes as possible.
I would never turn the water off to the tank and leave it turned on.
--
Wayne Boatwright
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Saturday, 07(VII)/26(XXVI)/08(MMVIII)
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-------------------------------------------
Don't get even -- get odd!
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Posted by Oren on July 26, 2008, 3:48 pm
>Is it safe to shut off the main water valve to a house, and put the
>water heater on "Low"? We will be leaving the house unoccupied
>indefinately.
>
That's a long time! Are you planning to turn off the
power/gas/utilities??
>My concern is the the water evaporating in the 40 gallon tank, and the
>tank being damaged. How long before I need to worry that this will
>happen with water shut off?
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Posted by tbasc@bellsouth.net on July 26, 2008, 4:36 pm
> Is it safe to shut off the main water valve to a house, and put the
> water heater on "Low"? We will be leaving the house unoccupied
> indefinately.
>
> My concern is the the water evaporating in the 40 gallon tank, and the
> tank being damaged. How long before I need to worry that this will
> happen with water shut off?
If 'indefinite' is more than several months, I'd worry about plumbing
traps drying out and venting sewer gas into the house.
I'd consider blocking the drains and draining the supply system.
T
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