I have a freestanding bathtub to be installed on a bathroom with concrete floor that will be tilled.
There were no instructions with the bathtub and the company doesn't really care (Brazil has terrible customer service for some stuff). The drain points straight down and is 40mm in diameter.
I can't use a 90° bend because that would press against the floor because the height will be greater than that of the feet.
I can try to drain directly below, but I'm not sure what is the best course of action. Have a standing pipe just a bit larger than the bathtub drain pipe for the bathtub drain to slide into? Making it some what hard fixed into the floor.
Have a shorter standing pipe (some 30 mm above the floor) the same diameter of the bathtub drain and use a rubber union to join then? More flexible, less chance of some breakage.
Have a dry floor drain (100mm diameter and some 50 mm deep) just below the bathtub drain and make it drain to the shower trap? Greater flexibility on positioning, but will it overflow?
What do you suggest in this scenario?