Reliable Automatic Sprinkler Co., Inc.,
103 Fairview Park Drive, Elmsford, New York 10523
Bulletin 040 Rev
. A
Bulletin 040 Rev. A
Model G5-56 300
Quick Response
Concealed Automatic
300 psi (20,7 bar) Rated
Sprinkler
The G5-56 300 Concealer
®
A Quick Response Concealed Sprinkler
with ¾” (19mm) Adjustment
For adjustable K5.6 sprinklers refer to Bulletin
162 for Technical Specifications and Approvals
Features
1. Cover plate attachment (Plain or Perforated)
with ¾” (19mm) total adjustment. Does not
require clips or springs.
2. Smooth aesthetic ceiling profile.
3. Factory installed protective cap.
4. Available in chrome and white painted finishes.
5. Ordinary and intermediate temperature rating.
6. 300 psi (20,7 bar) maximum pressure rating.
Listings & Approvals
1. Listed by Underwriters Laboratories, Inc. and Certified
by UL for Canada (cULus) - Quick Response
Note:
Approvals are for light and ordinary hazard. The
cup and skirt are fabricated from plated steel and are
recommended for interior, non-corrosive applications.
Note:
Paint or any other coatings applied over the factory
finish will void all approvals and warranties.
US. Patent Number 6,554,077
The Model G5-56 300 Concealer
®
is a cULus Listed Quick
Response Concealed Sprinkler intended for use in accor-
dance with NFPA 13.
Product Description
The Reliable Model G5-56 300 Concealer
®
uses a proven
quick response fusible element in a standard style sprin-
kler frame with a drop-down deflector. This assembly is re-
cessed into the ceiling and concealed by a flat cover plate
assembly. This threaded engagement provides ¾” (19mm)
of cover adjustment. The flat cover plate is attached to the
skirt using 135°F (57°C) ordinary temperature classification
solder or 165°F (74°C) intermediate temperature classifica-
tion solder. When the ceiling temperature rises, the solder
holding the flat cover plate melts, the flat cover plate re-
leased thus exposing the sprinkler inside to the rising ambi-
ent temperature.
The subsequent fusing of the solder element in the sprin-
kler opens the waterway and causes the deflector to drop
into position to distribute the discharging water. Any secure
engagement between the cover plate and cup will assure
that the drop-down deflector is properly located below the
ceiling.
Application
The Reliable Model G5-56 300
Concealer
®
is a versatile quick
response concealed sprin-
kler. It provides the best form
of fire protection while offering
an attractive appearance and
¾” (19mm) cover plate adjust-
ment for ease of installation. The
small diameter cover plate as-
sembly is easily attached and
Plain Cover Plate
Perforated Cover Plate
blends into the ceiling, concealing the most dependable
fire protection, an automatic sprinkler system.
The Model G5-56 300 Concealer
®
is designed for use
where aesthetic appearance is important. It can be used
at working pressures up to 300 psi (20,7 bar).
