STI (STI-13410FR) Universal Stopper Dome Cover W/Enc Bkbx,

The STI STI-13410FR is a Universal Stopper with enclosed back box, sealed mounting plate, and “FIRE” label — a clear polycarbonate protective cover for manual fire-alarm pull stations in installations that require the device to be enclosed at the wall surface. First, the installer mounts the enclosed back box with its sealed plate to the wall. Then the polycarbonate dome cover attaches over the back box on a continuous hinge. As a result, the pull station stays operational and visible while gaining vandalism, dust, and tamper protection.

What the STI STI-13410FR is built for

Manual fire-alarm pull stations in dusty industrial corridors, weather-exposed areas, or high-vandalism settings need enclosure protection. However, removing the pull station defeats NFPA 72 coverage. Therefore, the STI-13410FR cover provides the enclosed back box and sealed mounting plate that protect the pull station without restricting its operation.

Verified STI STI-13410FR specifications

• Family: STI Universal Stopper — without horn, enclosed back box, sealed mounting plate, Fire label
• Cover type: Enclosed back box with sealed mounting plate; low profile, ADA Compliant
• Material: Thick, super-tough, UV-stabilized polycarbonate (clear)
• Back box: Enclosed back box (vs. open spacer on the 132xx surface-mount variants)
• Mounting plate: Sealed mounting plate for additional protection
• Mounting: High-strength continuous hinge
• Label: “FIRE” lettering on the cover
• Horn: No integrated horn (the 13410 base; horn variants in the line have different suffix codes)
• Operating range: Polycarbonate working properties -40° to 250°F (-40° to 121°C)
• Compliance: ADA Compliant — low projection profile
• Listing: UL Listed to U.S. and Canadian safety standards
• Protects: Manual fire-alarm pull stations in environments requiring enclosed protection
• Warranty: Three-year guarantee against polycarbonate breakage in normal use

Where STI-13410FR fits in the Universal Stopper family

The STI-134xx series is the enclosed-back-box Universal Stopper line. Specifically, the FR suffix means Fire-label; the 132xx siblings use a surface-mount open spacer; the 144xx Low Profile siblings reduce wall projection further. Furthermore, this 13410 variant has no integrated horn — for tamper alarming, specify a horn-equipped Universal Stopper variant in the same family. As a result, the STI-13410FR is the enclosed-back-box, no-horn, Fire-labeled variant for protected fire-alarm pull stations.

When to use the enclosed back box

Surface-mount Universal Stoppers (132xx) work for most indoor pull stations. However, dust-prone industrial corridors, weather-exposed exterior installations, and high-tamper environments need more enclosure. Specifically, the enclosed back box and sealed mounting plate of the STI-13410FR provide that additional protection without changing the protected pull station’s visibility or operation.

Application context

Industrial facilities, manufacturing floors, dusty warehouses, and exterior pull-station locations are typical installations. In addition, the enclosed configuration makes the STI-13410FR suitable for areas where moisture or particulates would foul a surface-mounted cover. However, this is the no-horn variant — verify whether tamper alarming is required and specify a horn-equipped variant if so.

Need help selecting the right part or verifying compatibility? Our team supports thousands of commercial fire alarm installations every year. Call us at 1-888-557-0558 or email sales@lifesafetycom.com for application guidance, lead-time updates, or volume pricing.