DescriptionVariantsResourcesDescription The alarm check valve is a water flow alarm device designed for vertical installation in the main supply to a wet pipe sprinkler system. Alarm Check Valve is one type of check valve that prevents reverse flow from sprinkler piping by trapping pressurized water above the clapper. Retarding Chamber is used with Alarm Valve Trim when variable pressure is anticipated in the system. It is a holding tank to prevent activation of the Sprinkler Alarm during water pressure surge, but permits the activation of alarm on sustained flow. Mounting Type: Vertical. Sprinkler Alarm is a hydraulically driven mechanical bell. It does sound a continuous alarm when the sprinkler system operates. Mounting type Type-A & Type-B Variants MODEL APPROVAL NOMINAL SIZE MAXIMUM WORKING PRESSURE END CONNECTION Alarm Check Valve E0301 UL & FM 3” (80mm), 4” (100mm), 6” (150mm) & 8” (200 mm) 250 Psi (17.5 Bar) Flanged x Flanged, Flanged x Grooved, Grooved x Grooved Alarm Check Valve EN0301 Standard RETARD CHAMBER E0301-RC UL & FM RETARD CHAMBER EN0301-RC Standard Resources Coming Soon Related Products VORTEX INHIBITOR (PLATE) FLEXIBLE / EXPANSION JOINT AIR RELEASE VALVE/AIR VENT VALVE FOOT VALVE GLOBE VALVE Y-STRAINER CHECK / NON-RETURN VALVE BUTTERFLY VALVE GATE VALVE BALL VALVE TEST & DRAIN VALVE PRESSURE REGULATING VALVE PRESSURE RELIEF VALVE ALARM CHECK VALVE DELUGE VALVE