Re: Sprinkler system filled with antifreeze cause house to explode when activated

[JoeRaisin <joeraisin2001@xxxxxxxxx>]

Bill wrote:
>> Ok now guys, we have to put something in the sprinkler system that
>> will stop the lines from freezing. What should we use?
>>
>
> Businesses which have large frozen food areas have air filled fire sprinkler
> systems. A head pops, this releases the air pressure, then that activates a
> water valve. Water then flows through the pipes.
>
> And they of course don't want the alarm guy to test the flow switches on
> these! Then they would need to drain the pipes to get air back in...
>
>

Dry systems have an inspector's test valve on the riser that flows water
past the pressure switch (just as a dump would do) without flooding the
system.  I did it all the time.