Rock-Vent Transition Plate
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The Transition Plate allows you to connect our Rock-Vent Class A to our Rock-Flex Chimney Liner or Rigid Chimney Liner in a masonry chimney restoration. The plate measures 18" x 18".
An example installation when this plate is used is when a deteriorating masonry chimney is torn down to the attic. A liner, such as Rock-Flex, would be installed from the heating appliance to the Transition Anchor Plate, which is mounted to the top of the masonry chimney. Rock-Vent Class A chimney pipe would be installed on top of the Transition Plate upward to the required height.
Measurement Chart:
Rock-Vent Transition Plate

5” | 6” | 7” | 8” | |
A | 5” | 6” | 7” | 8” |
B | 7.5” | 8.5” | 9.5” | 10.5” |
C | 2” | 2” | 2” | 2” |
D | 1.7” | 1.7” | 1.7” | 1.7” |
*Due to many variables beyond our control, the installer should check actual parts for final dimensions.
Product Details:
The Transition Plate allows you to connect our Rock-Vent Class A to our Rock-Flex Chimney Liner or Rigid Chimney Liner in a masonry chimney restoration. The plate measures 18" x 18".
An example installation when this plate is used is when a deteriorating masonry chimney is torn down to the attic. A liner, such as Rock-Flex, would be installed from the heating appliance to the Transition Anchor Plate, which is mounted to the top of the masonry chimney. Rock-Vent Class A chimney pipe would be installed on top of the Transition Plate upward to the required height.
Measurement Chart:
Rock-Vent Transition Plate

5” | 6” | 7” | 8” | |
A | 5” | 6” | 7” | 8” |
B | 7.5” | 8.5” | 9.5” | 10.5” |
C | 2” | 2” | 2” | 2” |
D | 1.7” | 1.7” | 1.7” | 1.7” |
*Due to many variables beyond our control, the installer should check actual parts for final dimensions.
Specifications:
Help & Documents:
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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