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The Brigham Rock Maple 'Filter' System

:: Brigham ::
The filter is made by hollowing out the inside diameter of a 3.5” Rock Maple (Acer glabrum) dowel.
A special metal cap is pressure-fiited to its end which helps the filter fit snugly inside the pipe.
The system extends by one inch into the stem.
If Maple filter is a very dark brown colour, it is time for cleaning or replacing.
Brigham filter box
Brigham filter system
The filter fits into an aluminium conduit
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