Bulletin 056
Page 2 of 24
December 2016
www.reliablesprinkler.com
Model DD56-6 Specific Application Sprinkler
SIN RA5624
Technical Specifications
Style: Upright
Orientation: Deflector horizontal
Threads: 1/2” NPT or ISO 7-1R1/2
Nominal K-Factor: 5.6 (80 metric)
Max. Working Pressure: 175 psi (12 bar)
Sprinkler Temperature Rating: 212°F (100°C)
Sensitivity: Quick-response
Hydraulic Design Criteria
(See Table H)
Finish
Brass
Sprinkler Wrench
Model R2 or W2
Listings and Approvals
cULus Listed
Hazard Classification
Light Hazard
System Types
Wet-pipe with steel or Listed CPVC pipe
Dry-pipe with steel pipe
Installation Criteria
Sprinkler Spacing
Max: 6 ft (1.8 m) across roof slope
Min: 4 ft (1.2 m) across roof slope
Min: 26 ft (7.9 m) down the roof slope
measured parallel to the roof deck
Horizontal Distance from Face of Truss
Min: 6 inches (150 mm)
Vertical Distance of Deflector Above Scis-
sor Truss
Min: 18 inches (450 mm)
Horizontal Distance from Centerline of
Ridge
Max: 6 inches (150 mm)
Vertical Distance of Top of Deflector Below
Peak, Ridge, or Deck
Min: 17 inches (430 mm)
Max: 21 inches (530 mm)
Material Specifications
Thermal Sensor: Nickel Alloy Solder Link
Levers: Stainless Steel
Sprinkler Frame: Brass Alloy
Button: Copper Alloy
Button Clip: Stainless Steel
Sealing Assembly: Nickel Alloy with
PTFE
Load Screw: Bronze Alloy
Deflector: Bronze Alloy
Model DD56-6 Sprinkler Components and Dimensions
Figure 1
Model DD56-6 Minimum Required Flow and Residual Pressure
Table B
Ceiling Slope
Max. Coverage
Area
ft x ft
(m x m)
Flow
gpm
(l/min)
Pressure
psi
(bar)
4:12 to less than 6:12
6 x 40*
(1.8 x 12)
25
(95)
19.9
(1.37)
* Coverage is 20 ft (6.1 m) down slope in two directions measured along the floor.
