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Extension Ring

The ER-WMB Extension Ring addresses the challenge of improperly positioned WMB housings within walls. Patented for its utility, the extension ring compensates for housings set too deep by extending the sealing surface by 3/8” per ring, ensuring the enclosure's proper sealing and alignment with the finished grade. Up to three rings can be stacked to achieve the desired adjustment. Constructed from die-cast, copper-free aluminum for longevity, each ring is finished in a durable Black polyester powder coat, designed to seamlessly integrate with existing enclosure. This solution provides a straightforward fix to common installation issues, maintaining the integrity and aesthetics of WMB installations..
Specification Sheet



Install Guides


  • Aluminum

Accessory Type

  • Extension Rings