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I reviewed the project file, it is the Gem model F976 we are having issues with. Jamey

In a similar situation right now, Old manufacturing warehouse converted into a college campus in the late 80's, an entire wing utilized Gem concealed sprinklers. To date we have changed about 25% of the heads do to leakage and identified another 50 heads during the last annual, some of the...

Yes he has asked for another sprinkler, the gentleman that performed the inspection is actually a designer who was contracted by the owner to perform a design review of the entire building do to the large number of code violations noted by the Fire Inspector in other tenant spaces. I find it...

No clearance problems, I think the problem lies in the room being considered by the inspector as ordinary hazard and thus small room does not apply. While technically the room may be considered as such I have a hard time grasping how this head would not cover the space.

We have an existing two storey office building classified as Light Hazard, within one of the tenant spaces is a small 125sq' file storage room. Tenant space was renovated around 2009, the file room room has shelf storage of "bankers boxes" along three walls and three 4-0 high metal cabinets in...

Thanks to all that have responded, We tried the Hydraulic method but the accumulation is so compacted that it will not move from the bottom of the piping, 80 PSI was flow through the system utilizing 1.5" and 2.5" hoses and it is still showing approximately 25% blockage. Technicians managed to...

The unit you have linked to is called the Dropmaster, http://www.dropmaster.co/ (Which by the way works great and has saved our bacon several times for tenant improvements and the Central recalls.) However that is not what I am looking for, the unit we require injects water into the fire...

Flushing debris from fire sprinkler lines. I have seen the results of this method and it seems to provide a more thorough cleaning than the hydraulic method. See NFPA 25 2008 Handbook, Section D.5.4

Could anyone provide a link to a manufacturer of a Pneumatic flushing machine. Thanks in Advance!

Thanks for the reply’s, I posed this question to get everyone's opinion on what I see as a serious deficiency in the standard. I can find nowhere in any literature that requires a contractor to flow a specific amount of water. The standard recommends that a 25% drop in residual pressure is...

skdesigner, Thank you for your response to this matter. By interpret I mean "to construe the significance or intention of" in this case was it the stance of NFPA to only require a 25% drop in residual pressure? by adding "OR the total demand for fire fighting purposes" it indicates to me that...

I bet you can't quess what numbers the existing system has been designed too?? I can find nothing that requires the design contractor to use the most demanding curve, If test three had not been performed we would have no real indication of the water available! Can contractors arbitrarily choose...

No, building is only just a year old, new addition(s) will be light hazard but of course they are located as far as possible from the existing riser. I ask what test would have to be used because NFPA is not very clear on this point, NFPA 291 requires at least a 25% reduction in static pressure...

We are looking at a project that involves an addition to an existing instituitional occupancy(University)in Ontario Canada. Existing flow tests indicate available flows as follows: Static 68 PSI Test 1-50 PSI @ 223 USGPM Test 2-39 PSI @ 416 USGPM Test 3-13 PSI @ 538 USGPM Existing Hydraulic...

Have you looked into the Viega Pro press solutions? I know they offer both a 304 and 316 stainless line of pipe and fittings, just not sure if the stainless stuff is listed for fire use. Might be worth a call.

Could this be classified as obstructed construction? What is the distance of the finished ceiling from the roof or deck? Perhaps the 22" rule would apply? If the distance would be too great from the deck, can the sprinklers be spaced for above and below while still maintaining minimum 6-0 between?

Dave, I agree with your assesment with regards to an inspector's responsibilities while performing an annual performance test on a fire pump or any fire sprinkler devices for that matter. NFPA 25HB 2010 states: The contract with a fire protection contractor to perform the inspection...

Good info Gentleman, Still my concern lies with the original installation. The 2010 fire pump handbook is a great source to clarify some of the code requirements, here's one that applies here: NFPA 2010 20HB "4.18.1.2* Pressure relief valves shall be used only where specifically permitted by...

Good information here, posts like this are why I joined! As a person who has also seen many issues with pressure relief valves I wish to clarify my statement with regards to not worrying about these devices during a performance test: When performing an annual pump performance test should you...

New here and perhaps I don't understand the question, but the pressure relief valves would have been designed into the original pump specifications. Are these pumps diesel? If so see 4.18.1.1 NFPA 20 2011"Where a diesel engine fire pump is installed and where a total of 121 percent of the net...