Hello P Mann,
Thank you for your question regarding the Delta Bar / Prep Sink Flange and Strainer and I am happy to help you today.
This flange and strainer cannot be used to close off the drain to fill a sink. If you are interested, we do carry a kitchen disposal and flange stopper, model 72030 and a flange and strainer, model 72010, although the these models have a 4 1/2" diameter.
Please do not hesitate to give us a call on our warranty line at 800-345-3358 if we can assist you with anything going forward.
Date published: 2018-07-13