Reliable Concealer G4 Manual

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.
Reliable Automatic Sprinkler Co., Inc., 103 Fairview Park Drive, Elmsford, New York 10523
Model G4 Concealed
Automatic Sprinkler

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.
Bulletin 121
January 2020