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  1. Glorified Plumber 84

    Calculating K Factor (odd oriface size)

    I've got a weird design I'm working on, and it's not for a fire sprinkler system. The head has a 2.5mm or 0.0984252 inch orifice........how can I convert that to a k factor? The head itself has a recommended operating range of 1.5gpm at 45 psi. Applying fire sprinkler math, the k factor would...
  2. Glorified Plumber 84

    Exterior Projections less than 4'

    Possibly dumb question, but when NFPA 13 references exterior projections requiring fire sprinklers greater than 4' in width, are they referring to literal width or depth? I've always thought this as the distance the overhang projects away from the building, but maybe this is a massive oversight...
  3. Glorified Plumber 84

    Zoning and NFPA 13 vs NFPA 72

    I'm looking for some guidance on how to address NFPA 13, 2016e. section 8.2.4.2. The floor control valve, check valve, main drain valve, and flow switch required by 8.2.4.1 shall not be required where sprinklers on the top level of a multistory building are supplied by piping on the floor...

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