Are there any exceptions that allow for more than five appurtenances between section valves on the main line?
NFPA 24, Standard for the Installation of Private Fire Service Mains and Their Appurtenances Section 3.3.1 Appurtenance. "An accessory or attachment that enables the private fire service main to perform its intended function."
I found no limits on the number of appurtenances in NFPA 24. Per NFPA 24 the valves listed in Chapter 6 are appurtenances.
So I am confused about your question. What do you mean?
Perhaps you can clarify by description of your situation and the standard section references.
Helped? This is an open forum. Don't leave us hanging, what made you ask this question?
I'm assuming OP is referring to section 6.6.1 of NFPA 24, where there cannot be more than 6 sprinkler risers, standpipes, hydrants and other fire protection connections per section of the fire service main. As far as I know, there are no exception unless permitted by the AHJ.
The question posted used the term appurtenances which confused me. I think Emmanuel might be right. Maybe the post was thinking of fire protection systems.
There is always more to add. The private fire service main used in 2016 NFPA 24 is that pipe and it appurtenances that are on private property. It is the piping:
Excerpt from 2016 NFPA 24:
With the six fire protection systems being supplied a by a single private fire service main, the above figure appears not to require a sectional control valve in the private service main in accordance with Section 6.6.1 of the 2016 NFPA 24.
However, the concept of Section 6.6.1 is that sectional control valves are necessary to limit the amount of protection out of service with a private fire service main break, or when repairs or extensions are made to the system. Provide sectional control valves as follows:• On each side of all water source connections.• Within main sections so the number of fire protection systems located between sectional control valves does not exceed six.
Where the private fire service main in the above figure exceeds 6 fire protection systems, it is recommended to design a looped private fire service main. The looped piping is desirable since it allows water to reach the needed area from two directions, thereby limiting the number of fire protection systems out of service. If impairment occurs in the private fire service piping, water can be supplied from an alternate direction.
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