Alarm Check Valve AV-1-300

Automatically actuate electric and/or hydraulic alarms

Listings and Approvals: UL and C-UL Listed, FM Approved
Pressure Rating: 20 to 300 psi (1,4 to 20,7 bar)
Sizes: 2.5 inch (DN65), 4 inch (DN100), 6 inch (DN150), 8 inch (DN200)

  • AV-1 alarm valves may be installed vertically or horizontally
  • Automatically actuates electrically and/or hydraulically operated alarms when there is a steady flow equivalent to the discharge rate for one or more sprinklers
  • Available preassembled with modular trim to provide a quick and convenient method for trimming valve risers (contact the company for details)
  • For use in wet pipe (automatic sprinkler) fire protection systems
  • Optional retard chamber used in installations subject to variable pressure (generally associated with public water supplies) to help prevent false alarms
  • Available with European Conformity trim– see technical data sheet TFP990 for details


Tyco® Model AV-1-300 alarm valves are divided-seat ring, rubber-faced clapper, waterflow alarm valves that are intended for use in wet pipe fire protection systems. They are designed to automatically actuate electric and/or hydraulic alarms when there is a steady flow of water into the system that is equivalent to the discharge rate of one or more sprinklers. An optional Model RC-1 retard chamber is required for installations subject to variable pressures. It is used to help prevent false alarms associated with pressure variations in public water supplies. The Model AV-1-300 alarm check valve trim includes pressure gauges to monitor system pressure conditions, a bypass check valve, a main drain valve, and an alarm test valve. The bypass check valve reduces the possibility of false alarms by permitting slow and small transient increases in water supply pressure through the system without opening the waterway clapper.