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I need to clarify that the buildings are four stories and each floor is 18,750 sf.

You're right the flow is approx. 17 ft/sec. The development is an apartment complex and we the used the 2006 IFC requirements for the fire flow. The construction type is V-A, the buildings are sprinkled and around 75,000 sf for each building.

yes..the hydrant was tested and we got 1,250 gpm out of one eye. All of the joints will be restrained with megalugs and a concrete collar will be poured at the 6" to 10" transition. All of the valves on this main are gate valves that close pretty slowly. Thanks

It did change to 75% reduction if you have approved sprinkler systems.

At least 6 hydrants will be added. The required fire flow is 1500 gpm. No, the line will not be looped back to the existing main. There are no significant elevation changes. The development would be without water until the main is fixed. Thanks

Yes, we're going to relocate the existing hydrant and add some more in the development.

I downloaded the 2006 ifc and found my answer.

Did the reduction in fire flow requirement due to sprinklers change from 50% to 75% reduction from the 2003 IFC to the 2006 IFC? Thanks

Yes, we have spoken with the water owner and they approved it.

I have a project that was supposed to have a 16" watermain in front of the development. It turns out that the watermain is under a major roadway and is really deep. There is a hydrant in front of the development that we are considering taking off and extending a 10" main into the development...