Model F4FR Quick
Response Concealed
Automatic Sprinkler
Bulletin 125
Rev.
I
The Concealer
â
A Concealed Sprinkler
With
1
2
²
(13mm) or 1
1
2
²
(38mm)
Adjustmen
t
Features
1.
½
²
(13mm) Total adjustment provided by
economical standard inlet version.
2.
1½
²
(38mm) Total adjustment provided by
adjustable inlet versions.
3.
Adjustable inlet version available with either
1
²
NPT male or female threads
eliminating costly reducing coupling.
4.
Simple, sturdy, threaded cover plate attach-
ment; does not require clips or springs.
5.
Smooth aesthetic ceiling profile.
6.
Available in brass, chrome, white, black-
plated or other color painted finishes.
7.
Ordinary temperature rating.
8.
Multiple orifices for design flexibility.
U.S. Patent Number 4,880,063
Application
The Reliable Model F4FR
Concealer is the most versatile
quick response sprinkler available.
The Model F4FR Quick Response
Concealed Sprinkler provides the
best form of fire protection by offer-
ing an attractive appearance and
½
²
(13mm) cover adjustment for
ease of installation. The adjustable
1
²
NPT inlet versions have one and
one half inches of total adjustment, and they also eliminate
the need for a reducing coupling. The small diameter
Product Description
The Concealer
®
for quick response applications uses a
135°F (57
°
C) 3mm diameter glass bulb in a standard style
sprinkler frame with a drop-down deflector. This assem-
bly is recessed into the ceiling and concealed by a flat
cover plate. The cover plate and sprinkler cup assem-
blies are attached using a strong threaded engagement.
This threaded engagement provides ½
²
(13mm) of cover
adjustment. The cover plate is attached to the skirt using
135°F (57
°
C) ordinary temperature classification solder.
When the ceiling temperature rises, the solder holding the
cover plate fuses, thus releasing the plate and exposing
the sprinkler inside to ambient temperature. The subse-
quent shattering of the sprinkler bulb 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 de-
flector is properly located below the ceiling.
Note:
The cup and skirt are fabricated from corrosion re-
sistant plated steel and are intended for interior
non-corrosive applications.
The Reliable Automatic Sprinkler Co., Inc.
103 Fairview Park Drive, Elmsford, New York 10523
Bulletin
125
Rev
.
I
Listings and Approvals
1. Listed by Underwriters Laboratories Inc. and
UL certified for Canada (cULus)
2. NYC BS&A No. 587-75-SA / MEA 258-93-E
3. Loss Prevention Certification Board (LPCB)
Note:
Approvals are ordinary hazard except for
small orifice sprinklers which are limited to light
hazard occupancies.
cover plate is easily and positively attached and blends
into the ceiling, concealing the most dependable fire pro-
tection available, an automatic sprinkler system.
The Concealer
®
is designed for use where aesthetic ap-
pearance is important. Offices, hospitals, motels and res-
taurants 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 F4FR Concealer is a quick response concealed
sprinkler intended for use in accordance with NFPA 13.
The Concealer
®
can eliminate the need for precise cut-
ting of drop nipples. The threaded cover plate assembly
can be adjusted without tools to fit accurately against the
ceiling. The fire protection system need not be shut down
to adjust or remove the cover plate assembly.
UL Listing Categories
Sprinklers, Automatic & Open
Quick Response Sprinkler
UL Guide Number
VNIV
