RASCO/Reliable® R1021, Model G, Upright, 2.8K, SR, 1/2" NPT, Chrome, 286 Degree, GU33C, 5128212499, Fire Sprinkler Head G1136 Model G4-11 sprinklers are standard

Model G4-11 sprinklers are standard coverage

8 and K14 ECOH sprinklers

PHX - Phoenix Pipe Thread

Pressure Connection:  1/2" NPT nipple

RASCO/Reliable® R1021, Model G, Upright, 2.8K, SR, 1/2" NPT, Chrome, 286 Degree, GU33C, 5128212499, Fire Sprinkler Head G1136 Model G4-11 sprinklers are standardReliable 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