
The Reliable Automatic Sprinkler Co., Inc.
(800) 431-1588 Sales Offices
(800) 848-6051 Sales Fax
(914) 829-2042 Corporate Offices
www.reliablesprinkler.com Internet Address
Manufactured by Recycled 
Paper
Revision lines indicate updated or new data.
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 over 90 years, and are installed and serviced by the most highly qualified 
and reputable sprinkler contractors located throughout the United States, Canada and foreign countries.
Model F1FR‑FS5 LO Quick Response Pendent Sprinkler
Installation Wrench: Model D Sprinkler Wrench
Installation Data:
Sprinkler Type
Standard–Pendent (SSP)
Deflectors Marked to 
Indicate Position
K‑Factor Sprinkler 
Height
Approval 
Organizations
Sprinkler 
Identification 
Number (SIN)
US Metric
(20 mm) Standard Orifice 
with R 
1/2Thread 8.0 115 58 mm VdS RA3712
Application
Model F1FR-FS LO Flat Spray Sprinkler is used in concealed 
spaces, suspended open ceiling and in racks in accordance with 
CEA 4001 Sprinkler System Planning) and EN 12845 (Automatic 
Sprinkler Systems - Design Installation and Maintenance). 
Installation
Model F1FR-FS LO Flat Spray Sprinklers are quick response 
sprinklers intended for installation as specified in CEA 4001 
and EN 12845. They must also be installed with the Model D 
Sprinkler Wrench specifically designed by Reliable for use with 
these sprinklers.
Note: A leak tight 1/2” NPT sprinkler joint can be obtained with a 
torque of 8-18 ft-lb (10.8 - 24.4 N-m). Do not tighten sprinklers 
over maximum recommended torque. It may cause leakage or 
impairment of the sprinklers.
Ordering Information 
Specify: 
1. Sprinkler Model 
2. Sprinkler Type 
3. Orifice Size 
4. Deflector Type
5. Temperature Rating 
 – Specify Bulb Size when ordering 
6. Sprinkler Finish - Bronze only
Maintenance
 The Model F1FR-FS LO Pendent should be inspected 
quarterly. Do not clean sprinklers with soap and water, ammonia 
or any other cleaning fluid. Remove any sprinkler which 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 until used to minimize the potential for 
damage to sprinklers that would cause improper operation or 
non-operation.
Temperature Ratings
Classification
Sprinkler 
Temperature Max. Ambient 
Temp.
Bulb 
Color
°C °F
Ordinary
Ordinary
Intermediate
Intermediate High 
57
68
79
93
141
135
155
175
200
286
100 °F (38 °C)
100 °F (38 °C)
150 °F (66 °C)
150 °F (66 °C)
225 °F (107 °C)
Orange
Red
Yellow
Green
Blue
Pendent
EG. Printed in U.S.A. 09/14 P/N 9999970415