Hi, what option did you decide on? We are thinking of wet area bath/shower too due to a relatively small main bathroom. Concerned about cleaning up around freestanding bath...

Hi kristymacd, after changing my mind many times we went for a built in 1700 bath! Mostly as builder and tiler thought it would be easier to slope the floor properly and I liked the idea of the slightly larger built in compared to the 1590 back to wall. I’m sure a back to wall would’ve been possible and been fine, it all just got a bit hard and I knew both would look good. And I don’t think a back to wall would be any harder to clean than a built in - with a built in you have the hob and tiled face of the bath and back to wall there is the floor either side of the bath - same same! Here’s a pic of ours, not totally finished yet but really happy with it.

I think you have answered your own question in your comments. Unless for some Australian standard you need the overflow, I would just install the standard plug.

I can't see a problem with the drain. However Depending on the bath, he bath to walls requires " waterproofing "to some degree, to prevent water from pooling under the bath