STI Series Stopper® II, Stopper II
This unique and patented device helps to prevent false fire alarms without restricting legitimate alarms ✔️
✅ It consists of a tamper-proof, clear Lexan polycarbonate shield and frame that fits easily over manual pull stations ✔️
✅ When lifted to gain access to the actual alarm, it sounds a piercing warning horn. Immediate attention is drawn to the pull station and a prankster will run or be caught. Legitimate alarms can still be pulled. Use proven in thousands of applications around the worldincluding colleges, schools, hospitals, nursing homes, correctional institutions, hotels/motels and stores.
Standard Features
• Fits virtually all pull stations
• Tested and approved by wide range of fire prevention and testing authorities
• Unconditional lifetime guarantee against breakage and damage to molded polycarbonate cover
• Guards against physical damage to manual pull station
• Weatherproofing option
• Optional 9-volt alkaline battery (included) powered horn
Testing Approvals
Stopper II has been tested and approved or listed by:
• Underwriter Laboratories No. 49G2
• Underwriter Laboratories of Canada Issue No. 13959C
• Factory Mutual No. OG6A2.AY
• New York City Board of Standards No. 947-81-SA
• State of California (approval not required)
• General Service Administration
Dimensions
Size of Pull Station Accommodated The Stopper II can be installed over a flush-mounted station up to 5½ inches (140mm) wide x 6¾ inches (171mm) high. However, the pull station’s maximum dimensions will decrease as its depth (distance wall) increases. e.g.:
3¼ inch (19mm) deep pull station may be 5 inches (140mm) wide x 6 inches(152mm) high
1-5/8 inch (41mm) deep pull station may be 5 inches (127mm) wide x 6 inches (152mm) high
2-3/8 inch (60mm) deep pull station may be 4 inches (102mm) wide x 5 inches(146mm) high
2 inch (70mm) deep pull station may be 3 inches (76mm) wide x 5 inches (140mm) high
Mounting
Two types of mounting are available. Flush-mounted means the pull station is mounted directly on the wall. Surface-mounted means the pull station is mounted on an electrical box away the wall.
Ordering Information
Catalog Number | Description | Ship Wt. Ibs (kg) |
STI-1100 | Stopper II with Horn (UL/ULC) — Flush | 1.3 (0.6) |
STI-1130 | Stopper II with Horn (UL/ULC) — Surface | |
STI-1200 | Stopper II without Horn — Flush | |
STI-1230 | Stopper II without Horn — Surface | |
STI-1250 | WeatherStopper, flush c/w gasket (STI-3002) | 1.3 (0.6) |
STI-3150 | WeatherStopper, surface, c/w gaskets (STi3002 x2), 2” Spacer (STI-3100) and conduit gasket kit | 1.3 (0.6) |
Accessories
STI-3100 | 2 inch (50mm) Spacer | 0.5 (0.2) |
STI-3002 | Weatherproofing Gasket | 0.2 (0.1) |
STI-3003 | Weatherproofing Conduit Gasket | |
STI-3004 | Conduit Insert | |
STI-1280 | Black plate for rough wall mounting |
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