I'm in the middle of a tub to shower conversion but am a complete amateur when it comes to plumbing issues. The tub is out, the walls are open, we have the stand up shower kit bought. But upon looking at the existing plumbing I have a few questions.
1) Per this link: http://www.dndb.info/the-challenges-in-converting-bathtubs-to-showers/ it looks like we can't re-use the same drain line for the shower as we have in the tub (We're in Indiana not California but I'm not sure if that makes a difference). Would it be better just to cut the drain line back to main drain line and run new shower drain?
2) Since we're converting from tub to shower, we don't need the overflow drain cover anymore (the thing that you can push or pull and it stops up your drain so you can take a bath) can we just cap that section? I'm worried about venting, per this link: https://www.reddit.com/r/DIY/comments/3t63ah/bathtub_to_shower_cut_drain_overflow_pipe/
3) Is there an easy (no soldering) way to convert two faucet handles (hot & cold) into one shower faucet handle?
Thanks for all help in advance.
Important things: Green circle- the two knobs we'd like to convert to one for a stand up shower. I heard mention of shark bite fittings and I like that idea as we've already done a lot of work pulling out all of the water damage.
Blue circle- Overflow drain cover (if that's the right term). Can we cut this back and cap it?
Non-important thing: Red circle- this is an older house but I still had hope I could remove the existing drain from the drain pipe but this is not the case, I've tried everything (drain plug wrench, crow bar, dremel) and that drain will not come up, so we'll have to cut that pipe unfortunately.
EDIT 2: After getting quotes from two plumbers, I feel like the job is big enough to require a professional, especially since the drain line is a 1 1/2 inch line and it needs to be a 2 inch line for the shower. Thanks to everyone for their input.