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Form No. F_061721 Rev 03 April 2023
RESIDENTIAL DRY HSW
SPRINKLER K4.0 (57.7)
VK449
TECHNICAL DATA SHEET
6.3 Listing and Approval Specifications
Table 6.3: Approval Chart
Viking VK449, 4.0K-Factor Dry Residential Horizontal Sidewall Sprinkler
For Wet Pipe systems designed to NFPA 13D or NFPA 13R. For Wet Pipe systems designed to NFPA 13, refer to the design criteria.
For Ceiling types refer to current editions of NFPA 13, 13R or 13D.
Sprinkler
Base Part
Number 1
Style SIN
Thread Size Nominal K-Factor Maximum Water
Working Pressure
Lengths
NPT BSPT U.S. Metric Increments
Inches
Minimum
Inches (mm)
Maximum
Inches (mm)
24961 Recessed VK449 1” -- 4.0 57.7 175 1/4" (95) 24 (610)
25556 Recessed VK449 -- 25 mm 4.0 57.7 175 1/4" (95) 24 (610)
Footnotes
1. Part number shown is the base part number. For complete part number, refer to Viking’s current price schedule.
2. Listed by Underwriter’s Laboratories, Inc. for use in the United States and Canada.
3. Approved Finishes are: brass, chrome, ENT, white polyester, and black polyester.
4. Sprinklers with the white and black polyester finishes are cULus listed as corrosion resistant.
5. Other paint colors are available on request with the same cULus listings as the standard finish colors.
6.4 Hydraulic Design Criteria
Table 6.4: Hydraulic Design Criteria1
Viking VK449, 4.0K-Factor Dry Residential Horizontal Sidewall Sprinkler
For Wet Pipe systems designed to NFPA 13D or NFPA 13R. For Wet Pipe systems designed to NFPA 13, refer to the design criteria.
For Ceiling types refer to current editions of NFPA 13, 13R or 13D.
Max. Coverage Area 1
Width X Length
Ft. X Ft.
(m X m)
Max. Spacing
Ft.
(m)
Temperature Rating
Top of Deector to Ceiling
155 °F (68 °C) 200 °F (93 °C)
Flow 2
GPM
(L/min)
Pressure 2
PSI
(bar)
Flow 2
GPM
(L/min)
Pressure 2
PSI
(bar)
12 X 12 (3.7 X 3.7) 12 (3.7) 13 10.6 13 10.6
4 to 6 inches
14 X 14 (4.3 X 4.3) 14 (4.3) 14 12.3 14 12.3
16 X 16 (4.9 X 4.9) 16 (4.9) 18 20.3 18 20.3
16 X 18 (4.9 X 5.5) 16 (4.9) 21 27.6 21 27.6
16 X 20 (4.9 X 6.1) 16 (4.9) 25 39.1 25 39.1
12 X 12 (3.7 X 3.7) 12 (3.7) 13 10.6 14 12.3
6 to 12 inches
14 X 14 (4.3 X 4.3) 14 (4.3) 15 14.1 15 14.1
16 X 16 (4.9 X 4.9) 16 (4.9) 19 22.6 19 22.6
16 X 18 (4.9 X 5.5) 16 (4.9) 21 27.6 21 27.6
16 X 20 (4.9 X 6.1) 16 (4.9) 25 39.1 25 39.1
1. This chart shows the listings and approvals available at the time of printing. Other approvals may be in process. Check with the manufacturer for any additional ap-
provals. Refer also to Design Criteria.
2. For areas of coverage smaller than shown, use the “Flow” and “Pressure” for the next larger area listed. Flows and pressures listed are per sprinkler. The distance
from sprinklers to walls shall not exceed one-half the sprinkler spacing indicated for the minimum “Flow” and “Pressure” used.
