Products Description
The Model DH56 family of sprinklers are quick response
extended coverage sidewall sprinklers for use in light hazard
applications. The Model DH56 with SWC cover plate is a
concealed sprinkler that uses Reliable’s push on/thread off
sidewall cover. This sprinklerhasthecupfactorymountedand
is shipped with a protective cap that protects the 3mm
frangible glass bulb during shipping and post installation
finishing operations. The DH56 can be combined in the field
with the FP or F2 Escutcheon to make a recessed sprinkler.
TheSWCcover plate, FPand F2 recessed escutcheons have
½” adjustment. The SWC cover plate is attached with
135-degree solder. In the event of a fire the rising ambient
temperature melts the solder and the cover plate is ejected
away by springs exposing the3mmfrangible glass bulb. The
use of a 3mm bulb allows quick response which enables the
sprinkler to apply water to a fire sooner than standard
response sprinklers of the same temperature rating.

Application
The Model DH56 is a horizontal sidewall sprinkler intended
for installation in light hazard occupancies in accordance with
NFPA 13. These sprinklers are designed to provide fire
protection in long and narrow spaces such as hallways,
corridors, decks and rooms up to 28 feet (8,5m) wide and 10
feet (3m) long. They are rated for 250 psi (17,2 bar) and can
be mounted between 4 and 12 inches (102 and 305mm)
down from the ceiling.

Features:
1. Coverage for long and narrow spaces such
as hallways, corridors, decks and rooms
up to 28 feet wide and 10 feet long.(1)
2. Deflector to ceiling dimensions are:
4 (102mm) min. to 12 (305mm) max.
3. Minimum spacing between sprinklers
14 feet (4.3m).
4. Polyester Coated Corrosion Resistant
Sprinklers (cULus)
5. UL Listed for extended coverage, light
hazard applications.
6. 5.6 K Factor.
7. Sprinkler is approved for
250 psi (17,2 bar) applications.
8. Quick response performance.
9. ½ (13mm) adjustment of escutcheon
and cover.
10. Concealed cover plate can prevent the
sprinkler from being used for unintended
purposes. No exposed thermal element
with the concealed version.
11. Push-on/thread-off sturdy convenient
escutcheon for recessed and cover for
concealed.
12. Factory assembled sprinkler & cup,
shipped complete with protective cap for
concealed and FP recessed versions.
13. Sprinkler & cup assembly and escutcheon
or cover are separately packaged.
14. Cover finishes available in standard white
paint, special bronze, black paint or flat
white paint.

Approval Organizations
1. Listed by Underwriters Laboratories Inc. and
UL certified for Canada (cULus)
2. NYC MEA 258-93-E