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  1. concernpro

    NFPA 13D & Nonresidential Sprinkler Heads

    The contractor installed 4 sprinkler heads for a branch line of 1 inch diameter pipe (2 pendent heads below ceiling and 2 upright above ceiling). Per NFPA code requires only 2 sprinkler heads for 1 inch dia branch pipe. Contractor designer said 4 heads is acceptable per their hydraulic...

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