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Are there ANY dry pipe system valves designed/approved to be installed in the horizontal position. We have a very unique challenge........horizontal dry pipe valve would be the best option; however, I cannot find any approved for horizontal oreintation!! Thanks

I have a customer who has removed some of the suspended ceiling tiles (20ftx20ft area) in the middle of a large room. Elementary school occupancy. Steel deck above is 10 ft higher than the mineral tile ceiling. Pendent sprinklers remain where tiles remain. Upright sprinklers installed directly...

Part 1: Does anyone have any firm documentation which indicates whether or not public water departments can or cannot charge for water usage in dedicated fire service mains? Part 2: What percentage of dedicated fire service mains in your area of the country would you say already have public...

Does anyone know precisely what constitutes a "loaded" sprinkler head based on NFPA 25. NFPA 25 (2011 Edition) indicates the following: 5.2.1.1.4 Any sprinkler shall be replaced that has signs of leakage; is painted, other than by the sprinkler manufacturer, corroded, damaged, or loaded; or is...

I have had several customers ove rthe past few years ask me to show them in NFPA where it states that an external water motor gong or electronic fire alarm bell is required. It just happened again! If a water-based fire protection system has an electronic water flow switch with interior...

I have attached a picture on the following link: http://files.engineering.com/getfile.aspx?folder=8ca0e534-a2f8-40ee-b13f-71837de35fea&file=Unknown_Coupling.jpg Has anyone ever seen one of these on a fire system or anywheree else for that matter (approximately 3.5 in. long - looks like an...

I have a steel pipe antifreeze system which currently is filled with glycerin, but the concentration (& freeze temperature) is too low. Can anyone confirm for sure whether or not we can drain the glycerin and replace the antifreeze solution with a proper mixture of propylene glycol (approved for...

I can only find the following references regarding the requirement that a centrifugal horizontal split case fire pump must have a positive suction supply. 6.1.2* Application. Centrifugal pumps shall not be used where a static suction lift is required. A.6.1.2 The centrifugal pump is...

I find "exposed" CPVC sprinkler piping (typically Blazemaster) in light hazard occupancies on a fairly regular basis. When I say "exposed", I mean it is in the fire area rather than behind a fire rated wall/ceiling. I realize NFPA 13 does not specifically address this problem, but NFPA 13 does...

I apologize in advance for this rant. If anyone has any pull or influence with the development of NFPA 13........ Please discuss the idiotic approach of installing Inspector's Test Connections at the sprinkler riser (12 in. downstream of the flow switch). This has been considered "acceptable"...

I have noticed a trend over the past few years. Many new sprinkler systems are installed with no water motor gong and no electronic bell on the exterior wall. How do these contractors pass initial inspection without the required alarm (WMG or Electric Bell) on the exterior wall in the vicinity...

Can public utilities charge for water usage on dedicated fire protection systems? Are there any state or federal laws regarding this subject?

I have a customer who has a dry system protecting the attic area and wet system protecting the occupied areas (relatively new nursing home). The wet sprinkler piping is located in the attic spaces and the attic does not benefit from heat. We have had very mild winters in our region the past few...

Does anyone know where I can find the manufacturer's pump curve for a 1,500 gpm @ 125 psi Peerless Model 6AF 15-B fire pump? I am not sure about the manufacture date, but the pump is 20+ years old, has serial #313999 and the pump diameter is 17 in.

What temperature is considered excessive for a fire pump bearing? What temperature is considered excessive for the shaft? What temperature is considered excessive for the fire pump casing during churn periods? Nearly all of the fire pump inspection forms I have seen indicate the inspector...

I have a facility which originally had Central GB-Alpha sprinkler heads. The heads were replaced due to the O-Ring recall, but the contractor did not replace the two piece recessed escutcheons in the ceiling drywall and suspended ceiling tiles. My client has asked me to replace several of the...

I have a facility where two of the dry pipe systems feed freezers (28F and -10F). Both systems feed cooler areas (40F) with a portion of the system also in the fairly large freezer areas. This facility has a history of ice plugs.......no surprise to anyone in the industry. I am fully aware of...

I have been asked to replace 125 painted sprinkler heads in the 9 paint booths at this certain facility. This plant has a long history of painting even when the protective bags are missing......the result is overspray and painted heads. I cannot find where NFPA code allows or does not allow...

I am having a difficult time finding the NFPA code requirements for Super Flex polybutylene pipe in a hotel. This plastic pipe is grey in color. I conduct sprinkler system inspections and we have this sprinkler piping in a hotel I just inspected. I have identified several problems, but the owner...