Hasny, as per the general comments in your earlier request regarding designing a fire sprinkler system, I think you are taking a big risk with something of this complexity. The questions you are asking show you are treading on very dangerous ground relative your apparent knowledge on the subject.
Please consider getting a fire sprinkler company to design this for you. There may not be a fire for ten years or even never, but if there is and blame can be placed on the sprinkler failure, and insurance companies love to redirect blame/cause, this could financially ruin you.
Please give this some serious thought. I have only your best interests at heart an this bothers me that you are proceeding and still asking very basic questions.