Cavibrick Rectangular to Round Converter Sleeve

  • Black polypropylene.
  • Size 75mm x 225mm x 100mm projection, also 225mm x 150mm x 100mm project and 225mm x 225mm x 100mm projection.
  • Accepts standard Cavibrick - 1,2 or 3 Cavibrick heights.
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Where it is proposed to provide ventilation to a remote room, under floor area or void, a rectangular to round converter sleeve is available to permit the use of standard 100mm nominal plastic soil pipe. The Cavibrick promotes excellent air throughput that can be conveyed using standard pipe if so required. We recommend sleeves are protected with a cavitray where they pass through the cavity, to comply with NHBC/best practice. (See Sleeve and Duct Cavitrays.)


Permits cavibrick to be connected to standard pipe.


  • Black polypropylene.
  • Sizes to fit one, two and 3 bricks.
  • Accepts standard Cavibrick.
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All you need to know about Cavity Tray Standards