UNITED FIRE SYSTEMS
NITROGEN-
PAC™
MODEL SC-W
INSTALLATION, COMMISSIONING, AND MAINTENANCE MANUAL
REVISION 1.01 MAR 2021 - P/N 30-NPWICM-000
40
3.3. Piping Requirements.
All piping should be Sch. 40 black steel. All fittings should be Class 150 black threaded.
Galvanized pipe is not recommended. All pipe should be securely fastened in a workmanlike manner. Limit the pipe
lengths between the Model SC-W assembly and the sprinkler valve(s) to those in
Table 7
.
Table 7
Piping Limitations
SINGLE RISER SYSTEM
CHOOSE ONE
OPTION
Pipe Size (NPS)
Maximum Length
– All Pipe
(feet)
OPTION 1
Supply Pipe from Model SC-W to sprinkler valve = 1/2 inch
300
OPTION 2
Supply Pipe from Model SC-W to sprinkler valve = 3/4 inch
600
TWO RISER SYSTEM
CHOOSE ONE
OPTION
Pipe Size (NPS)
Maximum Length
– All Pipe
(feet)
OPTION 1
Supply Pipe from Model SC-W to Branch Pipes = 1/2 inch
300
Branch Pipes from Supply Pipe to sprinkler valve = 1/2 inch
OPTION 2
Supply Pipe from Model SC-W to Branch Pipes = 3/4 inch
600
Branch Pipes from Supply Pipe to sprinkler valve = 1/2 inch
NOTE:
On multiple riser systems, branch pipes from supply pipe to AMDs should be as short as possible.
Summary of Contents for Nitrogen Pac SC-W
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