Ok here's the deal as per the clean water act, the Purveyor must set a cross
connection control policy. (Water Supplier) The minimum for cross connection
control of a Pollutant, (Fire Sprinkler Water without additatives) is a
Double Check assembly. or Air Gap. Some water authorities have simplified
their lives by requiring all backflows to be RPZ type.(No need to classify
or check for change of use.) (Most will still allow the air gap, since its
fool proof) (That is until some fool puts a hose on it and eliminates the
gap)Whenever a fire engine connects to a FDC there is the possibility of
cross connection. Eventually all engine's will be equipped with RPZ devices
to prevent cross connection from their tanks or pumps, which may have had
AFFF or Pond water as their previous source of contamination, or stagnation,
similar to what occure's inside of the fire sprinkler system, occurring in
vehicles that see little use. The backflow industry has done one hell of a
marketing (Scare tactic's) job with the governments in this country, such
that they are mandated everywhere, even tho the number of documented deaths
each year was less than 10% of those that die by fire. We should hire their
PR people, and maybe we can be universally mandated.
Thom McMahon
Firetech, Inc.
2560 Copper Ridge Dr
Steamboat Springs, CO 80488-2136
Tel: 970-879-7952
Fax: 970-879-7926
----- Original Message -----
From: "Roland Huggins" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Friday, July 13, 2007 8:03 AM
Subject: Re: Backflow: Sprinkler System
One of the aspects that drive an RPZ is when the fire dept draft from
non-potable sources (anytime).
Roland
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