Re: Sprinklers - Pressure relief

["Jim" <alarminex@xxxxxxx>]

On Jan 31, 8:46?pm, "Jim Rojas" <jro...@xxxxxxxxxxxx> wrote:
> Sprinkler system pressure is usually regulated by street water pressure.
> Since sprinkler systems are designed to handle the 3 times the highest
> possible water pressure from the city water supply, you don't need to worry
> about over pressure at all.
>
> The check valves or backflow preventers are there to make sure the system
> holds its highest possible street pressure at all times in case city water
> supply falls low, due to drought, or high demands.
>
> Since the check valves & backflow preventors prevent water from leaving the
> system, often times the water gets stagnet, and gets heavy soot from oil &
> mineral deposits. During an annual inspection, the inspectors test valve is
> opened to simulate a head trigger. This should trigger the waterflow switch,
> and generate an alarm, after 45 seconds.
>
> It is a good idea to leave the inspectors test valve open for a couple of
> minutes, or until the water turns clear. I have been on inspections where
> the water comes out pitch black and has a real fowl odor.
>
> Jim Rojas
>
Jim, are you saying that the water actually smelled like chickens? ;-)