The building was not originally sprinklered. The 4" standpipe was installed in the last year. The original standpipe is 6" feeding a Class III standpipe system only.
I am attempting to perform a standpipe flow test on a residential high-rise that was built in 1963. It is located in Houston. Does anyone know what the required gpm and residual flow that is needed at the most remote hose connection? The local AHJ is saying that 25 psi residual is sufficient...
