NFPA 14 2010 edtion
NFPA 14 2010 edtion
(OP)
Does NFPA 14 2010 edition,
Require isolation valves on a manual dry pipe system?
NFPA section if required.
Thanks
Require isolation valves on a manual dry pipe system?
NFPA section if required.
Thanks





RE: NFPA 14 2010 edtion
6.3.2 Valves shall be provided to allow isolation of a standpipe
without interrupting the supply to other standpipes from the
same source of supply.
R/
Matt
RE: NFPA 14 2010 edtion
6.3.2 Valves shall be provided on all standpipes, including
manual-dry standpipes, to allow isolation of a standpipe without
interrupting the supply to other standpipes from the same
source of supply.
RE: NFPA 14 2010 edtion
I take section 6 as water supply to system
Three floor building
Submitter is putting a butterfly valve right before each of the first outlets.
Does not indicate them on upper floors
So the only thing they appear to be isolating is one outlet?
Have asked for section reference
RE: NFPA 14 2010 edtion
3.3.11 Standpipe. The vertical portion of the system piping that
delivers the water supply for hose connections, and sprinklers on
combined systems, vertically from floor to floor. The term standpipe can also refer to the horizontal portion of the system piping that delivers the water supply for two or more hose connections, and sprinklers on combined systems, on a single level.
R/
Matt
RE: NFPA 14 2010 edtion
So if the valve is closed, the only thing isolated is about three feet of pipe and outlet
RE: NFPA 14 2010 edtion
The valve should be located in the Feed Main upstream of the Standpipe.
R/
Matt
RE: NFPA 14 2010 edtion
There is an isolation valve for each of the four vertical mains, so each vertical main can be isolated.
Not drawn like that
RE: NFPA 14 2010 edtion