FPPI Expansion Tank: NFPA 13, 13D and 13R requires the use of an expansion chamber on antifreeze systems with backflow preventers. The TrimFit ET25 is a rubber bladder filled expansion chamber designed for use on antifreeze based fire sprinkler systems.
FIG 06-025 Expansion Tank
Expansion Tank
Swing Check Valves
Ball Drips, Brass
Orifice Union
TRIMFIT® Test & Drain Valve
Angle Globe Valve
TrimFit® Bronze Butterfly Valves - FNPT
Sight Glass
TrimFit® Bronze Butterfly Valves - Grooved
Adjustable Pressure Relief Valves
TrimFit Ball Valve