I doubt they make a Fernco Coupling that big, but they might be able to help. Cheap, reliable, easy to install. That is a specific brand, I*'m sure there are other similar products. Check here:
But semo's idea is way better, if you have budget (and inlet would be less than $1000 if it is less than 8 feet deep). A junction will give you access. A junction might be required by local ordinance, so check before you spec a Fernco coupling.
Remember: The Chinese ideogram for “crisis” is comprised of the characters for “danger” and “opportunity.”
-Steve
yes, typically used to connect storm drain pipes of different sizes or types or at a change in alignment or grade. Standard details may be found on the MAG website at: