STI-13520NW Universal Stopper with Horn Pull Station

Product Description

The SAFETY TECHNOLOGY INT'L INC STI-13520NW is a universal stopper cover with integrated horn designed to protect manual pull stations and similar life-safety devices from accidental or unauthorized activation. The unit mounts over an existing pull station and sounds an audible alarm when the cover is lifted or disturbed, alerting personnel to intentional or unintentional contact before the protected device is triggered. This type of deterrent device is commonly installed by licensed electricians and fire alarm technicians as a supplemental layer of protection in commercial and institutional settings.

The STI-13520NW is suited for installation over standard manual pull stations in commercial buildings, schools, hospitals, and other facilities where accidental activation is a concern. The universal fit design allows it to accommodate a wide range of pull station profiles without requiring specialized hardware or custom mounting. It is typically deployed in high-traffic areas where pull stations are exposed to accidental contact or where deterrence of non-emergency use is required.

Key Features

• Integrated horn sounds upon cover disturbance, providing an audible deterrent before pull station activation
• Universal fit accommodates a broad range of standard pull station form factors
• Sold as a single unit for straightforward individual installation
• Designed for life-safety and fire alarm system protection applications

Compatibility

Designed as a universal-fit stopper cover for standard manual pull stations commonly found in commercial and institutional fire alarm systems.

Installation Notes

Installation is typically performed by a licensed electrician or certified fire alarm technician in accordance with NFPA 72 and applicable local codes. Disable or isolate the protected pull station circuit per facility procedures before mounting the cover to avoid inadvertent alarm activation. Verify that the stopper cover does not obstruct required access to the pull station as defined by the authority having jurisdiction. Confirm battery or power source for the horn is functional before returning the system to service.