The answer is that you use an electrition's bushing(not tapered) instead of a plumbers bushing (tapered) for th 2" incert into the drain. The Roman tub drain should now fit.

Lgshell,
You're responding to a old thread.
This thread was closed back in 09. Look in the upper left hand corner for a date, regards, Tom

Have you found the drain? I am doing the same type shower/tub. My problem is the same, the drains.
Did you find a way to do the drains under the tub the same way like the bathtub or how did you resolve that problem?

I have crowlspace, so I can work under, but I will like to know if I should use the same part on the wall of my tub, like the traditional for getting air, and avoid air locks, and on the button I should use an attachment and then a drain for shower and then the top drain that Tom suggest? can you send me a picture if you have resolve this problem, because with the liner and the concrete we really need a higher gap.

Sol

Hi Milo,I realize this is an old post, but it's still a very big issue, Roman tub lift and turn drains (like Westbrass D3201 or similar) are readily available.. its finding the 2 piece shower flange made to use with a shower pan liner that will accept the D3201 that is the problem. The only drains I can find with 2 7/8 on center screw holes are the cast iron flanges that are used in hot mop tar application (like oatey 151 series or similar). In one of your posts above, you have a picture of a 2 piece flange (for vinyl pan liner) with roman tub lift and turn drain already installed in the throat assembly. Where do we find this? Is it real? Or is it a unicorn? I have been on the phone with Oatey, Westbrass, California Faucets as well as at the desk at the 2 larges plumbing supply houses in the town I live in and I got nuthin...