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.
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Expansion Tank
Sight Glass
Swing Check Valves
Globe Valves
TrimFit Ball Valve
Orifice Union
TrimFit® OS&Y Fire Main Gate Valves
TRIMFIT® Test & Drain Valve
TrimFit® Bronze Butterfly Valves - Grooved
Extension Nipples, Brass