I have seen plenty of systems, that have leaks, increase pressure, because of temperature increase. I see gauges that stick (tap it, and it now reads different) I once installed a system with hundreds of 4'-0" sprig-ups, and it took my pump about a 45 minutes to pump up (you could have let out 2...
I agree with CDAFD. Does project have backflow preventer? Can you install a pressure regulator, and recalc. Was original system installed with extra heavy pattern piping, and heads? I would worry about the listing of materials. Most are 175 PSI max working pressure. Maybe you could talk to...
From my experience, the recalled sprinklers were glass bulb, and the bulb sat flush to the seat, and the seat sat flush to the bottom of orifice. I would check to see if the model in question was part of the recall. I have also seen some copper systems that had so much flux present, that maybe...
I would say, about 50% of the systems in AZ, that have Hyd. calc. placards, have the address of the building, and the total no. of sprinklers, in the building, written in on the No. of sprinklers area. LOL! Good question. Silly questions are always the best ones!
I think NFPA is referring to threaded branch outlets, and not to copper or cpvc type systems. I would think that copper and plastic would be more flexible than threaded steel. Maybe someone with more knowledge than me can chime in. I know that small threads are more apt to break than soldered or...
Just got a service call on a building with 3" Cpvc mains with steel sprig-ups. You would not believe the amount of time it took us to track down all of the 3"fittings, and pipe, to make the repair. 7- days for shipping etc. I think parts came from 3- states. Something to think about, when...
Most jurisdictions will not require sprinklers in noncombustible spaces, but I have had several instances, where we were made to keep protection, because AHJ was worried about the low voltage wiring above ceiling, catching fire. I also had a situation where the block walls were insulated with...
We have been using them, and are pleased with them. Yes, and the min is 9'-0" between heads. We like them for sloped ceilings,as they only require only 13 GPM @ 7 PSI with up to an 8/12 roof pitch, with a 16x16 head spacing "Great for a concealed sprinkler"
Thanks, CDAFD. You don't know how many times we have had inspectors require the heads be within 5'-o" from the wall. It seems NFPAs explanatory material didn't quite hit the mark, on this code.
Per 8.6.4.1.4.3, In your opinions, what is the reason that sprinklers cant be installed any closer than 5'-0" from the intersection of upper and lower truss chords? I don't understand NFPA's explanation in their systems handbook. They say that if a fire starts on the eave they will have a head...
I wonder how much water on average is used in a unsprinklered building to put out a fire.
I worked at a hospital where it was cheaper for the sprinkler contractor to wet tap the fire main to add 1 sprinkler than to pay the city fee to shut down and drain the system.
Sorry for not being more clear, My original question was referring to the minimum distance a sprinkler can be placed next to a ceiling heat diffuser.
I know that most tyco residential heads have to be at least 2 ft. from vertical AC diffusers and 3 ft. from the front and 2ft. from the side of...
We install concealed sprinklers 4" min. from the edge of the coverplate to the wall, as the solder for the coverplate is at the edge of the cover, not the center of head. I don't know if this is code, but I think it should be.
