antifreeze systems

[twd22285]

this is from chris conley on the previous thread "Depending on the number of heads I would highly recommend a glycol system. It can be added to just the area(s) of concern.We frequently specify them near large overhead doors.Nothing wrong with dry pipe, but dry pipes tend to corrode over time."

i'm somewhat new to sprinkler design, i have been designing glycol systems for houses for the last six months or so, my question is how do you execute putting the anti-freeze in just a portion of the system.

tony

 

[ChrisConley]

Thanks for highlighting that I misread the last posting where they were asking about standpipes...

Typically the glycol loop is isolated from the rest of the system with a backflow valve (appropriate to your hazard and AHJ). A fill location is provided to refill the glycol in the event of loss.

 

[twd22285]

i wasn't doing that to ya
i just had never heard of that before.
thankyou for passing the knowledge on.
much appreciated

tony

 

[cdafd]

or would you call it an anti freeze loop??

not sure you can do it with just a backflow valve

 

[cdafd]

admended:

yes you can use a backflow as long as you add a few things and meet a few things

7.5.3.2
or
pipe per

7.5.3.1

nfpa 13 2002

 

[ChrisConley]

I was just kidding Tony.