<VV> pvc/pressure NO CORVAIR

[Mark J. Murphy]

That is CPVC, sold under the brand name "Blazemaster" and others, and is
rated for line pressure fire sprinkler system in certain residential
locations, using plain water or a glycerin-based antifreeze.  It degrades in
sunlight and cannot be used legally if faded.  Large systems are often
tested for leaks with regulated nitrogen (not high pressure) as it fills the
piping faster than the average portable compressor, although even that
practice is frowned upon by the maker.  See
http://www.blazemaster.com/DESIGNSPECIFICATION/dodont.asp. (Yes, I do
plumbing/fire suppression for a living).
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      ,-----___\----,    Mark Murphy
      \--(o)----(o)--'  Derry, NH, USA
    http://m.j.murphy.home.comcast.net/
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


----- Original Message ----- 
From: <Bonnzz at aol.com>
To: <virtualvairs at corvair.org>
Sent: Wednesday, November 02, 2005 11:32 AM
Subject: <VV> pvc/pressure


> hey gang,
> I install acoustical (drop) ceilings in commercial bldgs in south Florida.
> For over 10 years  many condos are adding sprinkler systems to meet
current fire
> codes. Many use an orange pvc  (normaly 2-2.5 inches in diameter) which
they
> test with nitrogen gas under very high pressure. I think the water
pressure is
> around 100 lbs or more when activated.