And the major key to the whole article should be this:

 "There is a history of fires in this building, but this is by far the
best, since no one was injured and no fire damage occurred."


It just kills me how the media has to always find something negative to
glorify in their story.  Water can be mopped up and belongings dried
out, granted there was some additional damage due to the excess water
but how much worse would it have been had the fire not been controlled?




Craig L. Prahl, CET
Fire Protection Group
Mechanical Department
CH2MHILL
Lockwood Greene
1500 International Drive
PO Box 491, Spartanburg, SC  29304-0491
Direct - 864.599.4102
Fax - 864.599.8439
[EMAIL PROTECTED]
http://www.lg.com


-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Todd
Williams - FPDC
Sent: Wednesday, November 21, 2007 7:03 AM
To: [email protected]
Subject: Interesting story

This happened just up the road from me. 
http://www.norwichbulletin.com/news/x579214634.

It's good for sprinklers, bad for water damage. I was talking to a
fitter (he didn't do the job, but claimed to be familiar with it) who
told me that the building has a fire pump for the standpipe and the
sprinkler piping is CPVC. His thought was that if air is trapped in the
CPVC pipe and there is a water hammer from the pump starting, that could
cause a CPVC pipe to burst. I would think if the jockey pump is set
properly, water hammer would not be an issue. Any thoughts? Any
experience with CPVC bursting due to water hammer? I know the Fire
Marshal fairly well and I'll see what I can glean from him next time we
speak.

Todd G. Williams, PE
Fire Protection Design/Consulting
Stonington, Connecticut
www.fpdc.com
860.535.2080
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