Just as you would use the pressure increase if this was an elevated tank,
you use it in your calc's here as the water source is in fact a reservoir,
just as the tank is, and is located above your riser.
Thom McMahon
Firetech, Inc.
2560 Copper Ridge Dr
Steamboat Springs, CO 80488-2136
Tel: 970-879-7952
Fax: 970-879-7926
----- Original Message -----
From: "Bob Knight" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Saturday, September 08, 2007 10:51 PM
Subject: Pressure and Elevation
I have a situation where there is approximately a 35’ drop in elevation in
the UG piping from the point-of-connection to the building. This is a
situation that usually seems to occur in reverse. If it were an increase in
elevation I would account for the elevation pressure loss in my
calculations, but since this is a drop in elevation do I take that into
account with my calculations as well? This would give me an additional 15
or so psi at the base of riser. To me this seems wrong, but is it? Do I
add this to my static and residual pressure? Or, is this just added to the
residual? Or, do I do nothing at all?
Bewildered in Idaho,
Bob Knight, CET
(208) 495-2057
[EMAIL PROTECTED]
www.firebyknight.com
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8:36 AM
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