TFP443
Page 4 of 6
Maximum
Coverage
Area
(a)
Ft. x Ft.
(m x m)
Maximum
Spacing
Ft.
(m)
WET PIPE SYSTEM
Minimum Flow and Residual Pressure
(b, c)
Ordinary Temp Rating
160°F (71°C)
Deflector to
Ceiling
Installation
Type
Minimum
Spacing
Ft.
(m)
Flow
GPM
(L/min)
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 inches.
Beamed
Ceilings per
NFPA 13D
13R, or 13
Installed in
beam 7/8 to
1-1/8 inches
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)
(a) 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 section under the Design Criteria are stated.
(b) The Minimum Flow requirement is based on minimum flow in GPM (LPM) from each sprinkler. The associated residual pres-
sures are calculated using the nominal K-factor. Refer to “Hydraulic Design” in the Design Criteria section for details.
(c) 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
(a)
Ft. x Ft.
(m x m)
Maximum
Spacing
Ft.
(m)
DRY PIPE SYSTEM
Minimum Flow
and Residual Pressure
(b)
Ordinary Temp Rating
160°F (71°C)
Deflector to
Ceiling
Installation
Type
Minimum
Spacing
Ft.
(m)
Flow
GPM
(L/min)
Pressure
PSI
(bar)
12 x 12
(3,7 x 3,7)
12
(3,7)
15
(56,8)
9.4
(0,65)
Smooth
Ceilings 7/8 to
1-1/8 inches.
Beamed
Ceilings per
NFPA 13D
13R, or 13
Installed in
beam 7/8 to
1-1/8 inches
below bottom
of beam
Concealed
8
(2,4)
14 x 14
(4,3 x 4,3)
14
(4,3)
15
(56,8)
9.4
(0,65)
16 x 16
(4,9 x 4,9)
16
(4,9)
16
(60,6)
10,7
(0,74)
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)
21
(79,5)
18,4
(1,27)
(a) 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 section under the Design Criteria are stated.
(b) The Minimum Flow requirement is based on minimum flow in GPM (LPM) from each sprinkler. The associated residual
pressures are calculated using the nominal K-factor. Refer to “Hydraulic Design” in the Design Criteria section for details.
(c) 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 FLAT-PLATE CONCEALED PENDENT SPRINKLER (TY2524)
NFPA 13D, 13R, AND 13 HYDRAULIC DESIGN CRITERIA
TABLE B
DRY PIPE SYSTEM
SERIES LFII RESIDENTIAL FLAT-PLATE CONCEALED PENDENT SPRINKLER (TY2524)
NFPA 13D, 13R, AND 13 HYDRAULIC DESIGN CRITERIA
