We are laying tile down on cement board on subfloor. The result is that our toilet drain pipe will need to be extended about 3/4". Could someone please direct me to the tools I would need and also the process? We will also have to extend the shower drain as we will be putting down cement board over subfloor. Then we have a Tere-Stone shower pan that we will be installing on top of the cement board. So again, another increase of about 3/4". I understand there is a tool that plumbers use that will cut the drain pipe from the inside. I don't know what it is called. I also am not sure what kind of pipe we have... though I think it is PVC. (I don't know how to upload pix to this message... I have pix... )

A cutoff wheel on a Dremel Will cut the shower drain http://www.gyrostools.com/attachments_accessories.htm and a closet extension kit will fix your toilet issue. Closet Flange Spacer Kit - Toilet Repair made by Plastic Oddities (http://www.accentshopping.com/product.asp?P_ID=154623)

Thanks for the quick answer! I have a Dremel tool... will get the part! Also will see about the spacer kit. Really appreciate this!

We are laying tile down on cement board on subfloor. The result is that our toilet drain pipe will need to be extended about 3/4". Could someone please direct me to the tools I would need and also the process? No problem here. Go to your local hardware store and purchase a set of flange extenders, (see image) . Cut the shower trap raiser back far enough to glue in a coupling. Good luck, Tom