Reliable G Series - Model G Upright Sprinkler; Technical Specifications; Material Specifications; Temperature Ratings

Model G Upright Sprinkler
Technical Specications
Style: Upright
Threads: (see Table B)
Nominal K-Factor: (See Table B)
Max. Working Pressure:
175 psi (12 bar)
Material Specications
Thermal Sensor: Solder capsule
Sprinkler Frame: Brass Alloy
Cap: Bronze Alloy with PTFE
Load Screw: Brass Alloy
Deflector: Brass Alloy
Sprinkler Finishes
(See Table F)
Sensitivity
Standard response
Temperature Ratings
135°F (57°C)
165°F (74°C)
212°F (100°C)
286°F (141°C)
Guards & Shields
D-1 Guard (UL)
C-1 Guard (FM)
C-3 Guard with Shield (UL, FM on R1025,
R1026, and R1027 only)
Sprinkler Wrench
Model W2
Listings and Approvals
(See Table B)
Model G Upright Sprinkler Components and Dimensions Figure 1
SIN K-factor (US) K-factor (Metric) Threads Approvals
R1021 2.8 40 1/2” NPT, ISO 7-R1/2 UL, FM
R1023 4.2 60 1/2” NPT, ISO 7-R1/2 UL
R1025 5.6 80 1/2” NPT, ISO 7-R1/2
UL, FM, LPCB,
EC: 1438-CPR-0053
UKCA: 0832-UKCA-
CPR-S5104
R1026 8.0 115 1/2” NPT, ISO 7-R1/2 UL, FM
R1027 8.0 115 3/4” NPT, ISO 7-R3/4
UL, FM, LPCB,
EC: 1438-CPR-0053
UKCA: 0832-UKCA-
CPR-S5104
Model G Upright Sprinklers
Table B
Bulletin 110
January 2023
Page 2 of 10
www.reliablesprinkler.com