
PendentUpright
Note: Not all versions of the product are shown.
Features
• Standard coverage, standard-response sprinklers
• Upright, pendent, horizontal sidewall, and vertical sidewall 
deflectors
• Robust solder capsule thermal element
• Available in a wide variety of nishes
Product Description
Reliable Model G Series sprinklers are standard-response 
standard spray automatic sprinklers using a solder capsule 
thermal element. The solder is captured in the cylinder of the 
capsule by a stainless steel ball. When the solder melts, the ball 
moves into the cylinder allowing the thermal element to fall away 
from the sprinkler. When this occurs, the compressed strut and 
lever spring free from the sprinkler. System pressure then clears 
the waterway of all operating parts allowing the deflector to 
evenly distribute water.
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 G Series sprinklers are 
specically listed with and may only be installed with listed 
Reliable escutcheons. Refer to the technical information on the 
following pages for specic listings for recessed installations and 
Figures 6 and 7 for dimensional information.
www.reliablesprinkler.com
Model G Series 
Standard-Response Sprinklers
Bulletin 110 January 2023
Sprinkler Summary
Model K-Factor gpm/psi1/2 
(lpm/bar1/2)Listings & Approvals Threads Sprinkler Identication 
Number (SIN)
G Upright
2.8 (40) UL, FM 1/2” NPT, ISO 7-R1/2 R1021
4.2 (60) UL 1/2” NPT, ISO 7-R1/2 R1023
5.6 (80) UL, FM, LPCB, EC, UKCA 1/2” NPT, ISO 7-R1/2 R1025
8.0 (115) UL, FM 1/2” NPT, ISO 7-R1/2 R1026
8.0 (115) UL, FM, LPCB, EC, UKCA 3/4” NPT, ISO 7-R3/4 R1027
G Upright 
Intermediate
5.6 (80) UL, FM 1/2” NPT, ISO 7-R1/2 R1425
8.0 (115) UL, FM 3/4” NPT, ISO 7-R3/4 R1427
G Pendent
2.8 (40) UL, FM 1/2” NPT, ISO 7-R1/2 R1011
4.2 (60) UL 1/2” NPT, ISO 7-R1/2 R1013
5.6 (80) UL, FM, LPCB, EC, UKCA 1/2” NPT, ISO 7-R1/2 R1015
8.0 (115) UL, FM 1/2” NPT, ISO 7-R1/2 R1016
8.0 (115) UL, FM, LPCB, EC, UKCA 3/4” NPT, ISO 7-R3/4 R1017
G Horizontal 
Sidewall
2.8 (40) UL 1/2” NPT, ISO 7-R1/2 R1231
4.2 (60) UL 1/2” NPT, ISO 7-R1/2 R1233
5.6 (80) UL, FM, LPCB 1/2” NPT, ISO 7-R1/2 R1235
8.0 (115) UL 1/2” NPT, ISO 7-R1/2 R1236
8.0 (115) UL 3/4” NPT, ISO 7-R3/4 R1237
G Vertical Sidwall 5.6 (80) FM, LPCB, EC, UKCA 1/2” NPT, ISO 7-R1/2 R1285
Table A
When tted 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.