Stopper II® clear polycarbonate cover with a warning horn & French labelling for surface mounted manual pull stations

Robust protection for protruding manual pull stations.

This Stopper II model is specifically designed for manual fire alarm stations that are surface-mounted (projecting from the wall). It includes a deep spacer box to accommodate the thickness of the station. In addition to providing physical protection against impacts, it deters false alarms with a local siren that triggers as soon as the cover is lifted.

This cover is UL listed hence the equipment and its installation meets Canadian standards. It is also FM approved; the Factory Mutual Approvals is a group offering testing and certification services on products for commercial and industrial use. This piece of equipment is ideal for fire safety in public locations such as schools, hospitals, mills, etc.

STI™ product code: STI-1130/FRE

Stopper II® covers protect manual pull stations from impacts and help prevent false fire alarms without restricting legitimate alarms. The cover can easily be lifted and is connected to the frame by a metal cable. It was designed for indoors use only. Such an accessory requires a double action to trigger a fire alarm compared to a simple pull station which requires one sole move.

All labeling on the cover are in French, however, the instructions provided in the package are only available in English (PDF version available for download).

External dimensions:
Length 7.125 in x Height 10 in x Depth 5.5 in
(Length 18.1 cm x Height 25.4 cm x Depth 14 cm) 

Inner dimensions:
Length 5.5 in x Height 6 in x Depth 5.5 in
(Length 14 cm x Height 15.24 cm x Depth 14 cm) 

Polycarbonate thickness: 0.095 in (2.4 mm) 

This cover fits most pull station models, mainly surface mounted ones.

Covers with English labeling are also available when permitted by local regulations (see item ECSTI1130).

Polycarbonate properties:

Polycarbonate is a clear low flammability material highly resistant to impacts which features impressive mechanical and thermal properties, hence its use in so many fields. It is commonly used to manufacture safety eyewear, protective faceshield, law enforcement shield, optical lenses, thermal imaging and so many other vandal-proof items. The polycarbonate used for the fabrication of Stopper II® covers is UV-stabilized against degradation caused by the sun.

Maintenance and life service:

Some basic practices should be adopted to maintain manual pull station covers. It is thus recommended to wash the cover with lukewarm water and a gentle soap; be aware that if one lifts the cover while cleaning, the alarm will go on until the cover is snapped back into place. The manufacturer strongly advises not to use steel pads since they scratch any surface they touch which will temper with the legibility of the label. It also is not recommended to use harsh soaps on the cover since polycarbonate doesn’t mix well at all with a wide array of acids and other chemical compounds. Indeed, these products will make your cover kind of melt. If the cover surface isn’t soft to the touch and bubbles appear, the cover has been corrupted and must be replaced.

As for its life service, the manufacturer asserts that his Stopper II® covers are durable; some have been in service for almost 20 years. Of course, the warning horn and battery should be inspected every 6 months to make sure they function, and the 9-Volt battery should be replaced yearly if need be.

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