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The FM-approved UNITED Fire Systems Model AR-1 Wet-Pipe Fire Sprinkler System Air Vent is the answer for avoiding wet-pipe system internal corrosion AND complying with NFPA 13. Features and benefits include FM approval – complies with NFPA 13 component listing requirement; dielectric union – prevents dissimilar metal corrosion; ball valve – allows AR-1 servicing without sprinkler system shutdown; float valve – automatic shutoff of outlet when air is vented and water reaches device; strainer – protects float valve from particulate matter that could interfere with valve seat, and an outlet tubing connection – provides optional connection for remote draining.
UNITED Fire Systems