Our AHJ is currently requiring a lot of "Dry Manual Horizontal Standpipes"
Similar to your Dry system. We use DIP or C900 for the underground portion,
sloped to one end. We require flanged DIP for the risers. At the low point
we use a saddle on the bottom of the pipe or a corp tap, reduced to for a
curb stop or valve in an Irrigation box (For access) then a ball drip into a
dry well. The curb stop or ball valve in the irrigation box is normally open
allowing condensation to drain by the ball drip. When the FD pressurizes the
main the ball drip closes, just like at the FDC, or not! and the FDP pumper
either overcomes the additional 1/2" of flow or closes the valve in the
irrigation box or curb stop.
Thom McMahon
Firetech, Inc.
2560 Copper Ridge Dr
Steamboat Springs, CO 80488-2136
Tel: 970-879-7952
Fax: 970-879-7926
----- Original Message -----
From: "Reed Roisum" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Tuesday, April 17, 2007 3:59 PM
Subject: RE: Underground Dry Pipe
That is the other problem. These problems are not being considered by
the people who are saying that it is the "only option". It is a simple
answer to them, "just run it underground".
The answer is, dunno. Maybe we would have some sort of pit??
Reed A. Roisum
Fire Protection Technician
Ulteig Engineers, Inc.
3350 38th Avenue South
Fargo, ND 58104-7079
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Todd
Williams - work
Sent: Tuesday, April 17, 2007 4:16 PM
To: [email protected]
Subject: Re: Underground Dry Pipe
How do you propose to drain the system?
At 05:05 PM 4/17/2007, you wrote:
I've got a outdoor amphitheatre that needs sprinkler protection. The
only option allowed to get from the controls (adjacent heated building)
to the arch on the amphitheatre is to go underground. We will be using
galvanized pipe for the dry system for the amphitheatre.
The question is what pipe should I spec for the dry underground? Can
(should) I use galvanized? Do you sleeve it? Any other suggestions?
Thanks,
Reed Roisum
Fire Protection Technician
Ulteig Engineers, Inc.
3350 38th Avenue South
Fargo, ND 58104-7079
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Todd G. Williams, PE
Fire Protection Design/Consulting
Stonington, Connecticut
860-535-2080
www.fpdc.com
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