F1-28 Series Sprinklers Summary
Sprinkler
Model
K-Factor gpm/psi
1/2
(lpm/bar
1/2
)
Orientation
Listings & Approvals
Max. Working Pressure
psi (bar)
Sprinkler
Identification
Number (SIN)
F1-28
2.8 (40)
Upright
cULus
175 (12)
RA1321
Pendent
175 (12)
RA1311
Table A
Model F1-28 Pendent
Model F1-28 Upright
Features
•
Standard coverage standard-response sprinklers
•
Upright and pendent deflectors
•
Low profile, compact design
•
Available in a wide variety of finishes
Product Description
Reliable Model F1 series sprinklers are standard-response
standard spray automatic fire sprinklers utilizing a 5.0 mm glass
bulb thermal element.
Pendent and horizontal sidewall sprinklers may be installed
exposed or surface mounted using escutcheons such as the
Reliable Models B, C, or HB (reference Technical Bulletin 204).
When installed recessed, the Model F1-28 series sprinklers
are specifically listed with and may only be installed with listed
Reliable escutcheons. Refer to the technical information on the
following pages for specific listings for recessed installations and
refer to Figure 3 for dimensional information.
When fitted with an approved water shield, these sprinklers may
considered intermediate sprinklers for use in racks, below grated
walkways, and other areas where intermediate level sprinklers are
required.
Table A provides a summary of the approvals and availability of
specific Model F1-28 series sprinkler configurations. Additional
technical information for each sprinkler model is provided on the
following pages.
Note:
This bulletin may contain information on New and Legacy
sprinklers that reflects a dimensional change only. Sprinkler
Identification Number (SIN), application, performance, an listings/
approval are not otherwise affected. Sprinklers with new frames
can be identified by a rotoclip indent on one side of the wrench
boss and in some cases an installed rotoclip. Sprinklers with new
frames will include the suffix “N” in the order. For reference only,
legacy version of this sprinkler can be found on Technical Bulletin
013.
www.reliablesprinkler.com
K-factor 2.8 (40)
F1-28 Series
Standard-Response Sprinklers
Bulletin 066 May 2021
