Retro back flow on fire sprinklers?

[mtlogcabin]

Is anybody requiring backflow preventers on existing fire sprinkler systems? If so what triggers the work/ Adding heads, how many, changing pipe size. Something Public Works wants to do but not sure when to pull the trigger on the requirement.

 

[cda]

have not had to do it that often

major remodel

change say to anti freeze

basicaly a lot of work on the system

 

[permitguy]

Our water districts began requiring this several years before I got here, regardless of whether their was work being performed. If you wanted to keep the domestic water on, you had to have a backflow on the fire line.

 

[RJJ]

I have two different water suppliers and they have required back flow for years. Over the last ten years I have only found three installs that lacked protection. All have been required to fix the issue not only by the AHJ, but the water supplier as well.