The Victaulic Series 751 Alarm Check Valve is a robust fire protection valve designed for wet pipe fire sprinkler systems. This 8-inch grooved alarm check valve features ductile iron construction, dependable alarm functionality, and compatibility with grooved piping for faster installation. With a maximum working pressure of 232 PSI, it delivers reliable, NFPA-compliant performance for large-scale commercial, industrial, and institutional fire protection systems.

How the Victaulic Alarm Check Valve Works

In standard operation, the internal clapper remains closed to prevent backflow into the supply line. When a sprinkler head activates and water flows forward, the clapper opens to allow system operation. Simultaneously, the valve’s trim diverts a portion of the flow to the alarm line, which may be connected to a hydraulic water motor gong or an electrical pressure switch (sold separately). This function provides immediate waterflow notification, a key requirement of NFPA 13 fire protection systems.

Installation and Maintenance

The Series 751 is designed for vertical installations with upward flow through the valve. Grooved end connections simplify installation compared to flanged valves, making it easier to incorporate into large riser assemblies. All auxiliary ports are threaded for compatibility with alarm, drain, and test connections. Internal parts can be serviced in place, streamlining inspections and reducing downtime for active fire protection systems.

Key Features of the Victaulic 8-Inch Alarm Check Valve

• 8 in. grooved inlet × 8 in. grooved outlet
• Maximum working pressure: 232 PSI
• Functions as both a check valve and waterflow alarm device
• Compatible with water motor gongs and electric pressure switches (sold separately)
• Designed for vertical installations with upward flow
• Ductile iron body for strength and durability
• NPT threaded auxiliary ports for alarm, drain, and test connections
• Internal components accessible without removing the valve
• UL Listed and FM Approved

Applications

The Victaulic Series 751 Alarm Check Valve is commonly installed in:

• Wet pipe fire sprinkler systems in large commercial, industrial, and institutional facilities
• Fire protection riser assemblies requiring grooved connections for fast installation
• NFPA 13 compliant systems with UL/FM certified components
• Projects that use water motor alarms or pressure switches for reliable waterflow notification

Certifications and Approvals

• UL Listed
• FM Approved
• NFPA 13 Compliant