PVC: How attach Schedule 40 4" to Type-C tele-duct?

[dh37]

I need to extend some 4" PVC drainage pipe. The problem I'm having is that the existing pipe is "Type C" ("tele-duct"). It has a slightly different outer diameter (4.350") than a typical PVC pipe (e.g. Schedule 40, 4.50").

I've only been able to find one possible "Type C to Schedule 40" adapter product, and it's from a wholesaler with a high minimum purchase. Is there any way to wrap the existing pipe with some kind of sheathing that's "compatible" with PVC cement to increase the outer diameter before cementing it to a "normal" Schedule 40 fitting?

 

[wwhitney]

4" no hub cast iron is also 4.35" outer diameter, so you could use a shielded coupling for 4" CI to 4" PVC, e.g. Fernco 3000-44. The two ends are slightly different and are labeled with raised lettering on the inside.

Cheers, Wayne