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Duravent Increases

Duravent increases are designed to increase from a smaller appliance flue outlet to a larger diameter chimney or pipe. These feature Duravent’s signature twist and lock connections to save you time and ensure easier installation on those tough jobs.

They are manufactured and designed right here in Australia to suit Australian homes and commercial spaces – they feature the same high quality, durability that Duravent is known for.
Duravent increases are intended for use with the duravent flueing system.

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75 x 100mm, 75 x 125mm, 75 x 150mm, 100 x 125mm, 100 x 150mm, 125 x 150mm, 150 x 200mm, 175 x 200mm, 200 x 250mm, 250 x 300mm