I'm putting in a new shower/tub surround in my bathroom. The main drain pipe for the tub (in the slab) is 14 inches from the wall. My new tub's drain is 15 inches from wall. Is there a way I can intall the new tub so the drain kit connects to the current system without having to redo the existing plumbing? Any help is appreciated.

You can use a flexible connector to install the drain with a 1" offset to your main drain. But perhaps inspect the drain connector u bought with the bath tub, it might have already an offset connector with it. If not, buy one. I guess it should help. Have a nice day.