TrimFit ET25 Expansion Tank - 2.5 Gallon - UL Listed Fire Sprinkler Products

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N.F.P.A. 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. It has been tested and U.L. listed to be compatible with both propylene glycol and glycerin based antifreeze. The expansion chamber regulates pressure caused by thermal expansion and contraction within the closed system.

• FPPI pressure gauges feature an impact and corrosion resistant case made from ABS (plastic).
• Features phosphor bronze bourdon tube movement with white enameled brass dial face with large numbers for easy reading.
• Dual scale to 300 PSI/2000Kpa.
• UL/ULc Listed (Sprinkler Gauge Model FPPI-PG, UL Listed file EX26630) and FM Approved.
• Material: Bourdon
• Tube: Copper Alloy C Type
• Pressure Connection: Copper Alloy 1/4" NPT lower mount (LM)
• Movement: Copper Alloy
• Dial: Aluminum White with Stop Pin Black and Red Lettering
• Pointer: Aluminum Black
• Case: Polycarbonate Black
• Listings and Approvals: UL Listed and FM Approved