The Reliable Automatic Sprinkler Co., Inc.,
103 Fairview Park Drive, Elmsford, New York 10523
Bulletin 034
Rev
.
B
Bulletin 034
Rev.
B
Model G5-56, Model G5-42,
Model G5-28
Quick Response Concealed
Automatic Sprinkler
UL Quick Response
FM Standard Response
Concealed Sprinkler With a
3
/
4
” (19mm) Adjustment
Features
1. Cover plate attachment (Plain or Perforated) with
¾” (19mm) assembly adjustment.
2. Smooth aesthetic ceiling profile.
3. Factory installed protective cap.
4. Available in Chrome and White as Standard Finish-
es. Special Application Finishes are also available.
5. Ordinary and Intermediate temperature rating.
For additional Sprinklers refer to Bulletin 154 for
Technical Speci
fi
cation and Approvals
Approvals & Listings
1. Underwriters Laboratories Inc. and cULus -
Quick
Response
•
G5-56 - Light Hazard and Ordinary Hazard
Occupancies
•
G5-42 - Light Hazard Occupancies
•
G5-28 - Light Hazard Occupancies
2. Factory Mutual Research Corp. (FM) -
Standard Response (See Page 3)
• See the most recent FM Global Property
Loss Prevention Data Sheets for installation
and use guidelines.
3. Loss Prevention Council (LPCB, UK) -
Standard
Response
•
G5-56 - Light Hazard and Ordinary Hazard
Occupancies
4. VdS Schadenverhütung GmbH -
Standard
Response
5. EC-Certificate of Conformity 0832-CPD-2062
U.S. Patent number 6,554,077.
Application
The Reliable Model G5-56, G5-42 and G5-28 are the most
versatile quick response concealed sprinklers available. It
provides the best form of fire protection while offering an at-
tractive appearance and
3
/
4
” (19mm) of cover adjustment for
ease of installation. The small diameter cover plate assem-
bly is easily attached and blends into the ceiling, concealing
the most dependable fire protection available, an automatic
sprinkler system.
The Model G5-56, G5-42 and G5-28 are designed for use
where aesthetic appearance is important. Offices, hospitals,
motels and restaurants are but a few of the applications where
it can be used.
The Model G5-56, G5-42 and G5-28 are UL Listed Quick
Response Concealed sprinklers intended for use in accor-
dance with NFPA 13. FM Approves the G5-56 and the G5-28
sprinkler as a standard response concealed sprinkler intended
for use in accordance with FM Loss Prevention Data Sheet 2.0.
Product Description
The Reliable Model G5-56, G5-42 and G5-28 uses a proven
quick response fusible element in a standard style sprinkler
frame with a drop-down deflector. This assembly is recessed
into the ceiling and concealed by a flat cover plate assem-
bly. The threaded engagement provides ¾” (19mm) of cover
adjustment. The flat cover plate is attached to the skirt using
either 135°F (57°C) or 165°F (74°C) ordinary temperature clas-
sification solder.
When the ceiling temperature rises, the solder holding the
flat cover plate melts, the flat cover plate released thus expos-
ing the sprinkler inside to the rising ambient temperature.
The subsequent fusing of the element opens the waterway
and causes the deflector to distribute the water. Any secure
engagement between the cover plate and cup will assure that
the drop-down deflector is properly located below the ceiling.
Plain Cover Plate
Perforated Cover Plate
