Thank you for your question regarding the Delta Classic 400 - 60" x 32" Shower Base and I am happy to help you today.
Unfortunately, we do not manufacture shower drain assembly kits and I apologize for the inconvenience.
Please refer to page 5 of the Maintenance and Installation manual for this model, which states the subfloor opening should be 5” in diameter and the drain pipe should extend 1-3/4” above the subfloor:
I hope this is helpful and if there is anything further that we may be able to help with, please do not hesitate to give us a call on our warranty line at 800-355-2721 and we will be happy to help you where we can.
Date published: 2018-08-20