once upon a midnight dreary, the listing required vane type water
flow switches to be a minimum distance away from the main drain.
Although, if the same switch was part of a listed shotgun riser
assembly, it could be installed much closer to the main drain. I
haven't looked lately.
Truth can be stranger than fiction.
Roland
On Feb 8, 2007, at 11:38 AM, <[EMAIL PROTECTED]>
<[EMAIL PROTECTED]> wrote:
FYI The distance from a fitting or valve is only a "should" not a
shall. There are no UL or NFPA requirements regarding distance.
There are a number of riser assemblies on the market that put the
switch closer than the stated 24" from a valve or drain. If the
switch works during the test after installation it's a good
installation.
Mike Cabral
---- Steve Leyton <[EMAIL PROTECTED]> wrote:
Look at the tech data sheet for the switch. For Potter Signal
products in the installation guidelines ...
Steve Leyton
Protection Design & Consulting
-----Original Message-----
From: Loren Johnson [mailto:[EMAIL PROTECTED]
Sent: Thursday, February 08, 2007 11:06 AM
To: Sprinkler Forum
Subject: WATERFLOW SWITCHES
Forum:
Can anyone direct me to where it indicates that a
waterflow switch for a wet pipe system has to be so
many inches away from the control valve or an
elbow/tee?
I seem to have seen this somewhere before, but now I
am unable to locate it. I thought it was in a pre-
vious edition of 13, but I'm not sure.
Thank you.
Loren Johnson - CFPS, CET
Fire Protection System Consultant
The Hitchcock Company
Peoria, IL
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