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Reviewed by 2 customers
Displaying reviews 1-2
12" length = 8.5" after assembly.
Comments about 12-in Vent Length:
Make sure you read the description carefully. I had to order the correct length after receiving the 6" pipe I ordered (which was actually only a 2.5" extension.) This was my first time using 3/5 concentric so maybe everyone else already knew this. Anyway, the fit turned out perfect and resulted in a professional tankless installation that replaced my gigantic 1940's boiler in the basement.
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Q:what is the max. extension on the outside wall.
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A:The outside wall measures 11".
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