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I believe what Travis is saying is that provided your existing fire sprinkler system is the same material as the extension, and the occupancy of the areas is the same, and the existing system was properly calculated originally, then using "equivalency" you may be able to size the new fire...

I realize that this thread is from 11/16, but as a contractor with more than 38 years experience I wanted to chime in. I have attended multiple presentations from various CPVC producers and vendors. I would say that all of them are aware of these issues and are interested in working through it...

FYI-I just completed a project where the public water supply entered a 400K SF building, went through a booster pump, then exited to supply a fire loop with exterior fire hydrant protection, the loop also supplied the interior fire sprinkler systems. There was no enforceable building and/or...

I am not sitting with my NFPA 13 tonight but have reviewed this with designers. As you indicate, I recall that the approach is an RA of the minimum required size (1500 SF in an LH or OH occupancy) or larger, you may omit the rooms protected with a single head from WITHIN the RA. Provided one...

We had the exact scenario discussed, a private fire hydrant downstream of the pump was having water removed and the main booster pump would cycle on. However with what is being described, I would consider any check valves on the booster pump suction line. If there is a backflow prevention...

Recently I went through this myself. I have three fire sprinkler software packages, but none fit my needs as regards flow tests. My solution, I wrote a flow test spreadsheet program using MS Excel and in two pages it prints out the flow test results and an N185 chart. The hard part is the N185...

The fire flows are often looked at with disdain, however as previously posted they are at 20-psi!!! Also, there are a number of ways to reduce the fire flow through the IFC, again the fire flow is still only measured at 20-psi. Your building code must have adopted NFPA 1 in order to refer to...

I went through most of this thread, but will add that the flow test meters I have used provide specific dimensions to meet for distances from fittings and from the meter. I have installed over 30 flow test meters, we have used them for startups and annual inspections since 1994. They must be...