neglected to cc the list...
On Sat, Sep 14, 2013 at 10:10 AM, David Scheidt <dmscheidt@gmail.com> wrote:
>
>
>
> On Fri, Sep 13, 2013 at 8:18 PM, Doug Braun <doug@dougbraun.com> wrote:
>
>> If this is a city water system, wouldn't the expanding water simply back
>> up
>> into the supply lines?
>>
>>
> Code -- and good sanitation -- should require an anti-backflow valve on
> the input. Water heaters run at less than 140 are potential breeding
> grounds for all sorts of the things you do not want in your water, like
> legonella. It's becoming common for code to require storage water heaters
> to have a temperature of 140F or higher, and use tempering valves to keep
> faucets from scalding people. (If you can, you do want to feed your
> dishwasher and washing machine with hot hot water.)
>
>
>
>> If it is a well system, shouldn't there already be an expansion tank that
>> can deal with it?
>> If there is an expansion tank, perhaps it has lost its air supply and is
>> completely full of
>> water? ( I'm not really familiar with the details of maintaining a well
>> system...)
>>
>>
> There should be some soft of expansion system, yes. House may be old
> enough that the expansion system was the city water supply --no backflow
> preventor, and one has been installed. It might also be that there's an
> anti-hammer riser that was sized (usually too small...) to do it, and it's
> full of water, not air.
>
>
>
--
David Scheidt
dmscheidt@gmail.com
_______________________________________________
Shop-talk@autox.team.net
Archive: http://www.team.net/archive
|