Model G4A
Quick Response
Concealed
Automatic Sprinkler
Bulletin 154
Rev.
F
Approvals & Listings
1. Underwriters Labortories, Inc. (UL)-
Quick Response
2. Underwriters Laboratories of Canada (ULC)-
Quick Response
3. Factory Mutual Research Corp. (FM)-
Standard Response
• Light Hazard Occupanicies-
No Limitations
• Ordinary Hazard Occupancies
Groups 1 & 2 Wet Systems Only
4. NYC MEA 258-93-E - Quick Response
U.S. Patent number 4,880,063.
Application
The Reliable Model G4A
Concealer
®
is the most versatile
quick response concealed sprin-
kler available. It provides the best
form of fire protection while
offering an attractive appearance
and ½
²
(13mm) of cover adjust-
ment for ease of installation. The
small diameter cover plate as-
sembly is easily attached and
blends into the ceiling, concealing
the most dependable fire protec-
tion available, an automatic
sprinkler system.
The Model G4A Concealer
®
is 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. It is available in different orifice sizes allowing the designer
to optimize system performance, thereby achieving a very
efficient installation.
The Model G4A Concealer
®
is a UL Listed Quick Response
Concealed sprinkler intended for use in accordance with NFPA
13. FM Approves this sprinkler as a standard response
concealed sprinkler intended for use in accordance with FM
Loss Prevention Data Sheet 2-8N.
Product Description
The Reliable Model G4A Concealer
®
uses a proven quick re-
sponse 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 assembly. The threaded
engagement provides ½
²
(13mm) 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 classification solder.
When the ceiling temperature rises, the solder holding the flat
cover plate melts, the flat cover plate released thus exposing
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.
The Reliable Automatic Sprinkler Co., Inc. ,
103 Fairview Park Drive, Elmsford, New York 10523
The Concealer
â
UL Quick Response
FM Standard Response
Concealed Sprinkler With a
½
²
(13mm) or 1½
²
(38mm) Adjustment
Features
1. Cover plate attachment with
1
2
²
(13mm)
assembly adjustment.
2. Smooth aesthetic ceiling profile.
3. Factory installed protective cap.
4. Available in brass, chrome or black
plated and white painted finishes.
5. Ordinary temperature rating.
6. Multiple orifices for design flexibility.
B
u
lle
tin
1
5
4
R
e
v.
F
