If I can't find a modular 48 inch shower unit with a side drain, then it looks like I will have to remove some concrete like what rmdhokie did in his basement at the following link below:
Basement Shower Drain Relocation
A couple questions for next steps after relocating the drain -
1. I should backfill the hole with the gravel that I pulled out to support the pipe. right?
2. Do I need to repour cement over the top of the hole? - all of it will be under the shower base - or can I just backfill with gravel and tamp it down so that it doesn't settle anymore?
3. If I set the bottom shower pan on the concrete floor - do I need to set it in concrete so it doesn't wobble? my floor appears to be pretty level and if I secure the pan to the adjacent studs I don't think it would move much or at all.
4. also - I plan on running a drain from an adjacent sink in a wet bar into this drain too. Are there any issues with doing this? I assume I should have it join the piping after the trap? - the sink will have its own trap. Also, the sink won't get that much use either, a few ice cubes, a few disposed warm beers, etc.
Thanks all in advance for any advice. I am doing all this for the first time and learning along the way.