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Backflow preventer / Fire Riser Arrangement in a Food processing facility

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  • Backflow preventer / Fire Riser Arrangement in a Food processing facility

    Hello all,

    I have a question regarding a Backflow preventer / Fire Riser Arrangement in a Food processing facility.

    The sprinkler system comprises two areas (food processing area and office area). Only the office are will be demolished.

    We are doing an office renovation and therefore, we will demo the entire sprinkler system on that area.

    There is a curious arrangement that I would like to know your thoughts about.

    It turns out that the fire riser for this system is located before the backflow preventer, being the latter located in a mezzanine level after the pipe penetrates the floor and rises to that level.

    The pipes are not branching off before going into the backflow preventer, so, in principle I thought that I would not be an issue. The client is concerned though, that we might get flagged by the code official on this.
    Also, I did not find anything on the code that tells me something about this.
    What do you think?

    Thank you!
    Last edited by Carlos Correia; 01-22-2018, 05:02 PM.

  • #2
    You definitely need to check with your local and/or state codes officials on this. It's hard to tell exactly what you're dealing with, but the system needs to be protected from back flow into the municipal water supply and cross contamination between the water used for fire protection systems and any water used for consumption.
    Member IACOJ


    • #3
      Best bet is the company that installed the system, or one like it.
      Opinions my own. Standard disclaimers apply.

      Everyone goes home. Safety begins with you.


      • #4
        I was thinking it sounds like a way of splitting the system so they could continue the system while the other was being built. Maybe like a zone valve?


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