Tyco WMA-1 Water Motor Gong for Fire Sprinkler Systems
The Tyco WMA-1 Water Motor Alarm is a mechanical device that provides a loud and reliable audible signal when a fire sprinkler system activates. Unlike electrical alarms, the WMA-1 uses water flow to power its striker, which repeatedly hits the aluminum alloy gong to create a clear ringing sound. This ensures dependable performance without requiring any electricity, making it a trusted choice for fire protection systems in commercial, industrial, and residential buildings.
Reliable Performance at High Operating Pressure
Engineered for long-term durability, the Tyco WMA-1 is rated for a maximum working pressure of 300 PSI. It is designed with a rugged aluminum alloy gong, a cast iron housing, galvanized steel nipples, and cast iron fittings to withstand demanding environments. The gong measures 8.5 inches in diameter, producing a penetrating alarm tone that can be heard clearly during an emergency.
Installation Versatility
The Tyco WMA-1 Water Motor Alarm includes a 3/4 inch NPT inlet for water flow and a 1 inch drain outlet for proper discharge. It is suitable for wall thicknesses up to 18 inches, making it adaptable to a variety of building conditions. Weighing just 9.8 pounds, the unit is easy to handle during installation while still offering the strength and durability expected from Tyco fire protection products.
UL Listed and FM Approved
This water motor gong is both UL Listed and FM Approved, ensuring it meets rigorous standards for safety and performance. When installed properly, the Tyco WMA-1 complies with NFPA 13 requirements for sprinkler systems with more than 20 sprinklers, where an audible alarm is a mandatory component.
Why Water Motor Gongs Are Required
Water motor alarms, also called water motor gongs, are required by many building and fire safety codes. They are typically installed on exterior walls of buildings to alert occupants, passersby, and emergency responders when a fire sprinkler system is discharging water. These alarms also help guide firefighters to fire department connections (FDCs), speeding up emergency response. Local jurisdictions may have specific requirements for the installation, inspection, and maintenance of water motor alarms, so it is important to consult local authorities and follow manufacturer instructions.
Benefits of the Tyco WMA-1 Water Motor Alarm
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No electricity required, powered entirely by water flow
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Operates at pressures up to 300 PSI
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8.5 inch aluminum alloy gong for clear, penetrating sound
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Durable construction with cast iron and galvanized steel components
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Mounts on walls up to 18 inches thick
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UL Listed and FM Approved for code compliance
Applications
The Tyco WMA-1 Water Motor Gong is designed for use in fire sprinkler systems across commercial, industrial, and institutional facilities. It is ideal for new construction as well as retrofit applications where a reliable, mechanical fire alarm is required.

