Black Double Wall Increaser / Reducer
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Product Details
Double Wall Increasers and Reducers allow you to adapt to your chimney pipe diameter of choice. We offer a large selection of pipe Increasers and Reducers. Install with male end pointing downward. Compatible with our black stove pipe along with Ventis, Champion, and Nexvent
Measurement Charts:
Double Wall Increaser

Wall Increaser Size | A | B | C | D | YY |
---|---|---|---|---|---|
5” Male to 6” Female | 5” | 5.75” | 6” | 7” | 5” |
6” Male to 7” Female | 6” | 6.75” | 7” | 8” | 5” |
6” Male to 8” Female | 6” | 6.75” | 8” | 9” | 5” |
7” Male to 8” Female | 7” | 7.75” | 8” | 9” | 5” |
Double Wall Reducer

Wall Reducer Size | A | B | C | D | YY |
---|---|---|---|---|---|
7” Male to 6” Female | 7” | 8” | 6” | 7” | 5” |
8” Male to 6” Female | 8” | 9” | 6” | 8” | 5” |
8” Male to 7” Female | 8” | 9” | 7” | 8” | 5” |
*Due to many variables beyond our control, the installer should check actual parts for final dimensions.
Product Details:
Double Wall Increasers and Reducers allow you to adapt to your chimney pipe diameter of choice. We offer a large selection of pipe Increasers and Reducers. Install with male end pointing downward. Compatible with our black stove pipe along with Ventis, Champion, and Nexvent
Measurement Charts:
Double Wall Increaser

Wall Increaser Size | A | B | C | D | YY |
---|---|---|---|---|---|
5” Male to 6” Female | 5” | 5.75” | 6” | 7” | 5” |
6” Male to 7” Female | 6” | 6.75” | 7” | 8” | 5” |
6” Male to 8” Female | 6” | 6.75” | 8” | 9” | 5” |
7” Male to 8” Female | 7” | 7.75” | 8” | 9” | 5” |
Double Wall Reducer

Wall Reducer Size | A | B | C | D | YY |
---|---|---|---|---|---|
7” Male to 6” Female | 7” | 8” | 6” | 7” | 5” |
8” Male to 6” Female | 8” | 9” | 6” | 8” | 5” |
8” Male to 7” Female | 8” | 9” | 7” | 8” | 5” |
*Due to many variables beyond our control, the installer should check actual parts for final dimensions.
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Our 316Ti flexible chimney liner and chimney liner components have passed the rigorous testing at the Underwriters Laboratories with best in class status and are UL Listed. So if you are looking for UL listed chimney liner sold directly to homeowners, then look no further than Rockford Chimney