Downsizing chimney pipe for a new stove

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New Member
Oct 20, 2023
We have an older single wide mobile home, built in 1972, with a built in hearth. The stove was removed before we purchased it. The chimney pipe is ancient Amerivent 6 FB which has an outer diameter of 9 inches. We pulled that. The roof jack is too large in circumference for the 6 inch chimney pipe we need for the stove. We bought a VC Aspen C3. We just had the roof sealed so we aren't wanting to have to replace the roof jack. Options?? Thanks so much!
6" DuraPlus has an OD of 8".

The design and tested flue system height for the Aspen C3 stove is 16'. Will this be possible in a mobile?