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An alarm bell or gong is a critical notification device in various fire protection systems. Bells may be networked to a control panel and a full fire alarm system. Or, when water begins to flow through a sprinkler system due to a fire, leak, or damaged sprinkler, the bell produces a powerful sound to alert occupants and emergency responders to a system event. At QRFS, we offer UL-listed alarm bells, gongs, and accessories designed for dependable performance, fast installation, and long-term reliability.
Whether you need a 120v AC electric alarm bell or a mechanical fire sprinkler water flow gong, we carry trusted products that help maintain code compliance and jobsite efficiency.
Fire alarm bells provide an audible signal when activated by a waterflow switch or a specific electrical signal within a fire alarm system or other system. These devices convert electrical power into a strong, clear sound that serves as an immediate notification of an emergency event, including water movement in a sprinkler system.
Our selection of alarm bells includes:
Each alarm bell for fire protection systems is engineered for a reliable signal from the initiating switch to the notification device. When connected to a compatible fire protection system, these bells support building safety and code compliance.
You can also explore our full line of electronic supervision products for compatible switches.
Fire sprinkler alarm bells are typically activated by a waterflow switch that detects movement in the sprinkler system. When water passes through the pipe due to a sprinkler system event or a significant system leak, the switch completes an electrical circuit, supplying power to the bell and generating an audible local signal.
These fire sprinkler system bells are commonly installed:
Alternatively, a water motor gong operates without electrical power, using the water flow from the sprinkler system to drive an internal mechanism that produces sound. These products are especially valuable in facilities that require a backup or standalone notification device that can operate without power.
In either case—electric bells or water motor gongs—proper installation ensures effective sound projection and reliable notification.
QRFS offers a range of fire protection bells, including both 120 V and 24 V electric alarm bells and mechanical water-motor gongs. All of our fire protection bells and gongs are selected for durability, performance, and compatibility with modern fire sprinkler, fire alarm, and other fire protection systems.
Whether you’re replacing an existing device or specifying equipment for new construction, QRFS provides expert support, fast shipping, and dependable alarm bell solutions for every fire protection application.
Need additional parts? Check out our selection of other supervisory devices, including:
You can also return to the QRFS home page to review additional equipment categories.
How does a fire alarm bell work with a fire sprinkler riser?
A fire alarm bell connected to a fire sprinkler riser is activated when water flows through the system due to a sprinkler head opening. A waterflow or pressure switch detects that flow and triggers the bell to sound an audible alarm. This helps alert occupants and responders that the sprinkler system has been activated.
What types of fire bells are available, and how do I choose one?
Fire bells generally fall into two main categories: electric bells powered by 12V/24V/120V connections and mechanical water motor gongs activated by water flow. Electric bells are often chosen for integration with fire alarm control panels, while water motor gongs don’t need electricity. Voltage compatibility, installation environment, and local code requirements are key factors when selecting a bell.
Can I mount a fire alarm bell outside?
Yes, fire alarm bells can be mounted outdoors if they are weatherproof and installed with protective accessories like back boxes and wire guards. Outdoor mounting is common for sprinkler waterflow alarms to notify people outside the building when water flow occurs. Always ensure that a bell and any accessories are suitable for exterior environments.
What is a water motor gong, and how does it work?
A water motor gong is a mechanical alarm bell that sounds when pressurized water flows through the fire sprinkler piping. Unlike electric bells, it doesn’t rely on electrical power — the force of the water moves internal mechanisms to strike the gong and produce sound. This makes them useful where electrical access is difficult or as a backup alarm.
Why might a contractor choose a water motor gong over an electric fire alarm bell?
Contractors sometimes prefer water motor gongs because they don’t require wiring or electricity, making them reliable in power outages or challenging installation locations. They are also less prone to false triggers caused by electrical issues and can provide responders with a mechanical indication of water movement. However, gongs may be less practical if the riser room is far from an exterior wall.
What are the basic steps to install a fire alarm bell?
Installing a fire alarm bell involves mounting it to a back box or outlet box, properly wiring it to the alarm circuit or switch, and adding protective accessories like wire guards if needed. After installation, it’s important to test the bell to ensure it activates correctly and meets the audibility requirements for the space. Always follow manufacturer instructions and locally applicable codes and standards when installing.
Can fire bells be used for purposes other than fire protection alarms?
Yes, fire bells are versatile and have been used in educational settings, security systems, or even as signal devices in non-fire applications. However, when used in fire protection systems, bells must meet code-required listings and be clearly distinguishable as fire alarm devices to avoid confusion.
