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Recent content by pryfred

  1. pryfred

    Standpipe Discovery

    I have a 12 story building with the following fire system characteristics: - wet-pipe combination standpipe system - 2 standpipe risers with 2-1/2" PRV hose valves and standard valve caps - 500 gpm fire pump (117 psi @ churn, 82 psi @ 150%) supplied from city water with 45 psi at pump inlet...
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