STI-3100 Stopper II Clear Conduit Spacer with Frame

The STI-3100 Conduit Spacer for Stopper II Clear is a durable accessory designed to extend the depth of STI Stopper II® and Weather Stopper II® protective covers. Constructed from clear, impact-resistant polycarbonate, the STI-3100 adds 2 inches of additional clearance, making it ideal for installations requiring surface-mounted conduit, deeper electrical boxes, or larger protected devices. Therefore, it provides installers with a simple solution for adapting Stopper II protective covers to a wider range of fire alarm, security, and emergency notification applications.

STI-3100 Function

The STI-3100 is designed to mount between the wall and a compatible Stopper II protective cover, increasing the internal depth of the enclosure. As a result, devices with surface-mounted conduit or extended profiles can be protected without replacing the existing cover. In addition, the spacer maintains the professional appearance and protective performance of the Stopper II enclosure.

Adds Two Inches of Installation Depth

The STI-3100 increases the enclosure depth by 2 inches, providing additional clearance for manual pull stations, horn/strobes, emergency buttons, and other protected devices. Consequently, installers can accommodate a wider variety of applications while minimizing installation modifications. Moreover, the added depth simplifies retrofit projects where exposed conduit is already present.

Clear Polycarbonate Construction

Manufactured from rugged clear polycarbonate, the STI-3100 provides outstanding impact resistance while maintaining complete visibility of the protected device. Therefore, users can easily identify the protected equipment without removing the cover. Furthermore, the clear finish blends seamlessly with STI Stopper II protective covers for a clean, professional installation.

Built-In Conduit Knockouts

The spacer includes conduit knockouts on both the top and bottom to accommodate 1/2-inch and 3/4-inch rigid conduit. As a result, conduit can enter the enclosure from multiple directions without field modifications. Additionally, filler pieces are included to seal unused conduit openings, maintaining a neat finished appearance.

Easy Retrofit Installation

The STI-3100 is designed for quick installation with compatible Stopper II products, making it ideal for both new construction and retrofit applications. Consequently, installers can adapt existing protective covers to changing project requirements without replacing the complete enclosure. Its lightweight construction also simplifies handling during installation.

Technical Specifications

• Model: STI-3100
• Type: Conduit Spacer with Frame
• Manufacturer: Safety Technology International (STI)
• Product Series: Stopper II® / Weather Stopper II®
• Material: Clear Polycarbonate
• Color: Clear
• Added Depth: 2 Inches
• Mounting: Surface Mount
• Conduit Knockouts:
  • Top Entry
  • Bottom Entry
• Conduit Compatibility:
  • 1/2-Inch Rigid Conduit
  • 3/4-Inch Rigid Conduit
• Includes: Filler Pieces for Unused Conduit Openings
• Dimensions:
  • Height: 8.5 in.
  • Width: 5.5 in.
  • Depth: 2 in.
• Application: Stopper II and Weather Stopper II Protective Covers
• Made in USA

Applications

The STI-3100 Conduit Spacer for Stopper II is ideal for:

• Stopper II protective cover installations
• Weather Stopper II installations
• Manual pull stations
• Horn/strobe notification appliances
• Emergency push buttons
• Access control devices
• Surface-mounted conduit installations
• Commercial buildings
• Healthcare facilities
• Educational institutions
• Industrial facilities

Reliable Stopper II Installation Solution

The STI-3100 Conduit Spacer for Stopper II Clear combines durable polycarbonate construction, 2-inch depth extension, and integrated conduit knockouts in a practical installation accessory. Overall, it provides installers with a flexible solution for accommodating surface-mounted conduit and deeper protected devices while maintaining the dependable protection and professional appearance of STI Stopper II enclosures.

STI-3100 Datasheet