Reliable G4 User manual

Reliable Automatic Sprinkler Co., Inc., 103 Fairview Park Drive, Elmsford, New York 10523
Bulletin 121 January 2020
Bulletin 121 January 2020
Model G4 Concealed
Automatic Sprinkler
The Concealer™
Features
1. Cover plate assembly attachment with ½”
(13mm) adjustment. Does not require clips
or springs.
2. Smooth aesthetic ceiling profile.
3. Available in white or other color painted or
brass, chrome, or black plated finishes.
4. Ordinary and intermediate temperature
ratings.
5. Multiple orifices for design flexibility.
Approvals & Listings
1. Underwriters Laboratories Inc. (UL)
2. Underwriters Laboratories of Canada. (ULC)
3. N.Y.C. BS&A No. 587-75-SA.
Note: Approvals are for light and ordinary hazard, except for small
orifice sprinklers which are limited to light hazard occupancies.
The cup and skirt are fabricated from plated steel and are in-
tended for interior non corrosive applications.
Application
The Reliable Model G4 Concealer™ is the most versatile
concealed sprinkler available. It provides the best form
of fire protection while offering an attractive appearance
and ½” (13mm) of cover adjustment for ease of instal-
lation. The small diameter cover plate assembly is easily
attached and blends into the ceiling, concealing the most
dependable fire protection available, an automatic sprin-
kler system.
The Concealer™ is designed for use where aesthetic ap-
pearance is important. Offices, hospitals, motels and restau-
rants 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 most
efficient installation.
The Concealer™ can eliminate the need for precise cutting
of drop nipples. The cover plate assembly can be adjusted
without tools so it mates accurately with the ceiling. The fire
protection system need not be shut down to adjust or remove
the cover plate assembly.
Product Description
The Reliable Model G4 Concealer™ standard response
uses the proven Model G 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.
This threaded engagement provides ½” (13mm) of cover ad-
justment. The flat cover plate is attached to the skirt using
an ordinary temperature classification solder. This results in
a strong cover plate assembly with an ordinary temperature
rating, and an intermediate temperature sprinkler which can
be installed in 150°F (66°C) environments. When the ceiling
temperature rises, the solder holding the cover plate to the
skirt melts, the flat cover plate released thus exposing the
sprinkler inside to the rising ambient temperature.
The subsequent fusing of the sprinkler element opens the
waterway and causes the deflector to drop into position to
distribute the discharging water. Any secure engagement of
the threads between the cover plate and cup will assure that
the drop–down deflector is properly located below the ceiling
when a sprinkler operates.

Reliable Automatic Sprinkler Co., Inc.
[phone] Sales Offices
[phone] Sales Fax
[phone] Corporate Offices
www.reliablesprinkler.com Internet Address
Manufactured by
Recycled
Paper
Revision lines indicate updated or new data.
EG. Printed in U.S.A. 01/20 P/N 9999970014
The equipment presented in this bulletin is to be installed in accordance with the latest published Standards of the National Fire Protection Association, Factory
Mutual Research Corporation, or other similar organizations and also with the provisions of governmental codes or ordinances whenever applicable.
Products manufactured and distributed by Reliable have been protecting life and property for almost 100 years.
Installation
Do not install The Concealer™ in ceilings which have positive
pressure in the space in the space above.
After a 25/8inch diameter hole is cut in the ceiling, the sprin-
kler is to be installed with the Model G4 Wrench. The wrench
has drive tangs which insert into cup slots. When installing a
sprinkler the wrench is first positioned into the sprinkler/cup as-
sembly until the wrench tangs engage drive slots in the top of
the cup (there are two sets of mating drive slots in the cup). The
sprinkler is then tightened into the pipe fitting. When inserting
or removing the wrench from the sprinkler/cup assembly care
should be taken to prevent damage to the sprinkler. DO NOT
WRENCH ON ANY OTHER PART OF THE SPRINKLER/CUP
ASSEMBLY. Install the cover plate assembly by pushing in and
turning clockwise until it is tight against the ceiling.
Maintenance
The Model G4 Concealer™ should be inspected and the
sprinkler system maintained in accordance with NFPA 25. Do
not clean sprinklers with soap and water, ammonia or any other
cleaning fluids. Replace any sprinkler or cover plate that has
been painted (other than factory applied) or damaged in any
way. A stock of spare sprinklers should be maintained to allow
quick replacement of damaged or operated sprinklers. Prior
to installation, sprinklers should be maintained in the original
cartons and packaging to minimize the potential for damage
to sprinklers that would cause improper operation or non-op-
eration.
Ordering Information
1. Sprinkler Model
2. Temperature Rating
3. Nominal Orifice
4. Flat Cover Plate Finish
Note: Unless otherwise specified, the 165°F (74°C) sprinkler will be
provided with the 165°F (74°C) cover.
Temperature Ratings
Classification Sprinkler G4/G5 Cover
Plate
Max. Ambient
Temp.
Ordinary 135°F/57°C 135°F/57°C 100°F/38°C
Ordinary 165°F/74°C 135°F/57°C 100°F/38°C
Intermediate 212°F/100°C 165°F/74°C 150°F/66°C
Installation Data
Sprinkler
Inlet
Total
Adjustment
Nominal
Orifice
Nominal
K Factor Approvals Sprinkler Identification
Number (SIN)
US Metric
½” NPT (R ½) ½” (13mm) ½” (15mm) 5.6 80 1,2,3 R2115
½” NPT (R ½) ½” (13mm) 7
/
16”(11mm) 4.2 60 1,2,3 R2113
½” NPT (R ½) ½” (13mm) 3
/
8” (10mm) 2.8 40 1,2,3 R2111
Cover Plate Finishes
Standard Finishes
White Paint
Chrome
Special Application
Finishes
Off White Paint
Black Paint
Custom Color Paint – Specify(1)
Raw Brass (Lacquered)
Bright Brass
Finished Bronze
Black Plated
Satin Chrome
Stainless Steel Clad(2)
(1) Custom color paint is semi-gloss, unless specified otherwise.
(2) Stainless steel clad cover plates are Type 316 Stainless Steel on the
finished side and C102 Copper Alloy on the back side. Cover plates
are not listed or approved as corrosion resistant.
Installation Wrench
Model G4 Sprinkler Wrench
Fig. 1 - ½” NPT (R½) Threaded Inlet