Reliable Automatic Sprinkler Co., Inc.,
103 Fairview Park Drive, Elmsford, New York 10523
Model RFS42
Residential Flat Concealed
Horizontal Sidewall Sprinkler
(SIN RA4835)
Bulle
tin 048 Ma
y 2022
Bulletin 048 May 2022
Coverage to 16 ft. x 20 ft. (4.9m x 6.1m)
Features:
1.
Flat cover plate for a flush, concealed wall finish.
2. 4.2 (60 metric) K Factor.
3.
Sized to fit in a 3½” or larger stud space even
when installed directly in a TorqueSafe
TM
90°
Sprinkler Head Elbow** and several other com-
mon ½” and ¾” by ½” sprinkler fittings.
4. Push-on/pull-off flat cover plate.
5. Sprinkler shipped complete with factory installed
protective cap.
6.
Sprinkler assembly and cover plate packaged sepa
-
rately.
7.
1
/
8
” (3.2 mm) cover plate adjustment.
8. Model RFS Cover plate available in a wide variety
of colors and finishes.
Listings & Approvals
1. Listed by Underwriters Laboratories Inc. and UL
certified for Canada (cULus).
UL Listing Category
Residential Automatic Sprinklers
UL Guide Number
VKKW
Patents:
U.S. Patent No. 7,353,882, other Patents pending
Product Description
The Reliable Model RFS42 Concealed Residential Extended
Coverage Horizontal Sidewall Sprinkler is an attractive, con
-
cealed sprinkler assembly specially sized to fit within a 3½”
or larger stud space. The sprinkler uses a push-on/pull-off flat
cover plate assembly. The sprinkler assembly is shipped with a
protective cap.
The flat cover plate is attached to the skirt using 135°F (57°C)
ordinary temperature classification solder. The sprinkler is in
-
stalled into the sprinkler fitting using the Model G6 Sprinkler
Wrench.
When the ambient temperature rises, the solder holding the
cover plate melts, allowing the release of this part and thus ex
-
posing the sprinkler inside to the rising ambient temperature.
This sprinkler is listed for a maximum service pressure of 175
psi (12,0 bar).
Application and Installation
The Model RFS42 sprinkler is intended for installation in the
residential portions of any occupancy in accordance with NFPA
13, 13R & 13D. The sprinkler is listed as a Concealed Residen-
tial Horizontal Sidewall Sprinkler. System design and installation
requirements for ceiling configurations are described in NFPA
13, 13R or 13D, as applicable.
The minimum listed spacing between Model RFS42 sprin
-
klers is 8 ft (2.4 m).
The low flow RFS42RES sprinklers are specifically engineered
to meet the latest residential sprinkler listing standards (UL
1626 Standard).*
The sprinkler must be installed and properly oriented with the
Model G6 Wrench:
Do not remove the factory installed plastic protective cap
since it is sized to fit inside the G6 wrench. Note that the sprin
-
kler can only mate when the sprinkler’s deflector orientation
tab (Fig. 1) is aligned with wrench’s key-way. The G6 wrench
is provided with bubble level pad and TOP marking, to allow
the proper orientation of the horizontal sidewall deflector. Final
leveling can be done after leak proof joint is obtained with a
minimum to maximum torque of 8 to 18 ft-lbs (11 to 24 N.m).
Leave the protective cap on to protect the sprinkler while the
wall is plastered, wallpapered or painted. The protective cap
must be removed and the listed cover plate installed prior to
the sprinkler system being placed in service. A 2
5
/
8
” (67 mm)
diameter hole must be cut in the wall for the sprinkler assembly
to extend through.
Concealed cover plate/cup assemblies are listed only for use
with specific sprinklers. The use of any other concealed cover
plate/cup assembly with the Model RFS42 Horizontal Sidewall
Sprinkler or the use of this dedicated concealed cover plate as-
sembly on any sprinkler with which it is not specifically listed will
void all guarantees, warranties, listings and approvals.
* Effective date 3/14/2008
**Spears Manufacturing Company
