The Victaulic Series 751 Alarm Check Valve is a dependable fire protection valve designed for wet pipe fire sprinkler systems. This 6-inch grooved alarm check valve combines rugged ductile iron construction, proven reliability, and integrated alarm functionality. With grooved end connections for efficient installation and a 300 PSI working pressure rating, it is well-suited for commercial, industrial, and institutional fire protection applications where NFPA compliance and long-term system performance are required.

How the Victaulic Alarm Check Valve Works

In normal operation, the internal clapper remains closed to stop water from flowing backward into the supply. When a sprinkler head opens and water flows forward, the clapper lifts, allowing system activation. At the same time, the valve’s internal trim directs a portion of water to the alarm line, which can be connected to a water motor gong or an electric pressure switch (sold separately). This alarm signaling feature ensures timely notification of waterflow in accordance with NFPA 13 standards.

Installation and Maintenance

The Series 751 is designed for vertical installations with upward flow through the valve. Grooved end connections provide faster installation compared to flanged systems and are compatible with standard couplings. All auxiliary connections are threaded for use with common fire protection trim. Internal parts can be accessed in place, making inspections and servicing straightforward while reducing downtime in active fire protection systems.

Key Features of the Victaulic 6-Inch Alarm Check Valve

• 6 in. grooved inlet × 6 in. grooved outlet
• Maximum working pressure: 300 PSI
• Provides check valve operation and waterflow alarm initiation
• Compatible with hydraulic water motor gongs and electric pressure switches (sold separately)
• Designed for vertical, upward flow installations
• Ductile iron body for durability in demanding fire protection environments
• NPT threaded auxiliary connections for alarm, drain, and test lines
• Internal components can be serviced in place
• 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 buildings
• Riser assemblies using grooved-end valves for faster installation and reduced labor costs
• NFPA 13 compliant fire protection projects requiring UL/FM approved components
• Systems connected to pressure switches or water motor alarms for waterflow notification

Certifications and Approvals

• UL Listed
• FM Approved
• NFPA 13 Compliant