Vaillant 9056 flat roof penetration collar is ideal for use with vaillant’s vertical air/flue duct, this flexible flat roof penetration collar creates a brilliant and lasting seal around the base of your vertical duct. This collar is suitable for flues with a 100 mm diameter. Perfect for a wide range of Vaillant systems, including both the ecotec and ecomax range. Diameter: 100 mm.
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