TFP442
Page 3 of 6
Maximum
Coverage
Area
1
ft x ft
(m x m)
Maximum
Spacing
ft
(m)
DRY PIPE SYSTEM
Minimum Flow
and Residual Pressure
2, 3
Ordinary Temp. Rating
160°F (71°C)
Deflector to
Ceiling
Installation
Type
Minimum
Spacing
ft
(m)
Flow
GPM
(LPM)
Pressure
psi
(bar)
12 x 12
(3,7 x 3,7)
12
(3,7)
13
(49,2)
7.0
(0,48)
Smooth
Ceilings
7/8 to 1-1/8 in.
Beamed
Ceilings per
NFPA 13D or
13R, or 13.
Installed in
beam
7/8 to 1-1/8 in.
below bottom
of beam
Concealed
8
(2,4)
14 x 14
(4,3 x 4,3)
14
(4,3)
14
(53,0)
8.2
(0,57)
16 x 16
(4,9 x 4,9)
16
(4,9)
15
(56,8)
9.4
(0,65)
18 x 18
(5,5 x 5,5)
18
(5,5)
18
(68,1)
13.5
(0,93)
20 x 20
(6,1 x 6,1)
20
(6,1)
21
(79,5)
18.4
(1,27)
Notes:
1. For coverage area dimensions less than or between those indicated, use the minimum required flow for the next highest coverage
area for which hydraulic design criteria are stated.
2. Requirement is based on minimum flow in GPM (LPM) from each sprinkler. The associated residual pressures are calculated us-
ing the nominal K-factor. See Hydraulic Design under the Design Criteria section.
3. For NFPA 13 residential applications, the greater of 0.1 GPM/ft
2
over the design area or the flow in accordance with the criteria in
this table must be used.
Maximum
Coverage
Area
1
ft x ft
(m x m)
Maximum
Spacing
ft
(m)
WET PIPE SYSTEM
Minimum Flow and Residual Pressure
2, 3
Temp. Rating
160°F (71°C), 212
°
F (100
°
C)
Deflector to
Ceiling
Installation
Type
Minimum
Spacing
ft
(m)
Flow
GPM
(LPM)
Pressure
psi
(bar)
12 x 12
(3,7 x 3,7)
12
(3,7)
13
(49,2)
7.0
(0,48)
Smooth
Ceilings
7/8 to 1-1/8 in.
Beamed
Ceilings per
NFPA 13D or
13R, or 13.
Installed in
beam
7/8 to 1-1/8 in.
below bottom
of beam
Concealed
8
(2,4)
14 x 14
(4,3 x 4,3)
14
(4,3)
13
(49,2)
7.0
(0,48)
16 x 16
(4,9 x 4,9)
16
(4,9)
13
(49,2)
7.0
(0,48)
18 x 18
(5,5 x 5,5)
18
(5,5)
17
(64,3)
12.0
(0,83)
20 x 20
(6,1 x 6,1)
20
(6,1)
20
(75,7)
16.7
(1,15)
Notes:
1. For coverage area dimensions less than or between those indicated, use the minimum required flow for the next highest coverage
area for which hydraulic design criteria are stated.
2. Requirement is based on minimum flow in GPM (LPM) from each sprinkler. The associated residual pressures are calculated
using the nominal K-factor. See Hydraulic Design under the Design Criteria section.
3. For NFPA 13 residential applications, the greater of 0.1 GPM/ft
2
over the design area or the flow in accordance with the criteria in
this table must be used.
TABLE A
WET PIPE SYSTEM
SERIES LFII RESIDENTIAL 4.9 K-FACTOR FLAT PLATE CONCEALED PENDENT SPRINKLER (TY3596)
NFPA 13D, 13R, AND 13 HYDRAULIC DESIGN CRITERIA
TABLE B
DRY PIPE SYSTEM
RAPID RESPONSE SERIES LFII RESIDENTIAL 4.9 K-FACTOR FLAT PLATE CONCEALED PENDENT (TY3596)
NFPA 13D, 13R, AND 13 HYDRAULIC DESIGN CRITERIA
