Model DD56-27 Specific Application Sprinkler
SIN RA5694
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 C and Figures 9 - 29)
Finish
Brass
Sprinkler Wrench
Model 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
Minimum 4 ft (1.2 m), maximum 6 ft (1.8m)
between sprinklers along ridge
Minimum 26 ft (7.9 m) down the roof slope
toward eave to nearest sprinkler,
measured parallel to the roof deck
Horizontal Distance from Face of Truss
Min: 6 inches (150 mm)
Vertical Distance of Deflector Above Scissor
Truss
Min: 18 inches (450 mm)
Horizontal Distance from Center-line 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 DD56-27 Minimum Required Flow and Residual Pressure
Table C
Ceiling Slope
Max. Coverage Area
ft x ft (m x m)
Flow
gpm (l/min)
Pressure
psi (bar)
6:12 to 8:12m
6 x 40* (1.8 x 12)
25 (95)
19.9 (1.37)
* Long dimension of coverage area to be along the roof slope parallel to trusses. Length of coverage area is
split equally to each side of the sprinkler at the ridge. Coverage area is measured parallel to the floor.
Model DD56-27 Sprinkler Components and Dimensions
Figure 2
Bulletin 056
February 2020
Page 3 of 27
www.reliablesprinkler.com
