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
Sight Glass
Adjustable Pressure Relief Valves
Extension Nipples, Brass
TrimFit® OS&Y Fire Main Gate Valves
TrimFit® Bronze Butterfly Valves - Grooved
TRIMFIT® Test & Drain Valve
Orifice Union
Globe Valves
Swing Check Valves
TrimFit® Bronze Butterfly Valves - FNPT