I looked for installation instructions for the used tub that I bought on Craigslist and found this very similar if not the same tub at The Bath Works. This one costs over $6000 and it is cast of “Silacore” a resin and mineral combination very much like fiberglass. The coating is a more dull white finish than acrylic finishes and better evokes the original cast iron model. It is double walled and very heavy. They made this tub in imitation of a French style from the mid to late 19th century.
I used the online inquiry form asking for installation instructions and they sent the size and measurement drawings for installation directly on the floor over the drain pipe.
They also sent all the measurements in millimeters and inches. Although these tubs are made in the USA the designs were from their company in England.
This tub is meant to be installed on the floor directly over the drain pipe, but it has a solid bottom so I’m considering installing it on blocks so that I don’t have to chip into concrete to run the drain line under the floor. The existing tub drain is located near the supply and the tub drain will be closer to the middle of the wall.
I’ve seen several idea photos with the tub set up on a platform or blocks in lieu of old fashioned feet. I have some Colorado red flagstone blocks that might look good under the tub.
A platform such as a 2×4 box might work if it was just under the tub’s bottom. I ordered the drain kit and some extra pipe to determine how the drain could run and then I’ll try the various above slab solutions first.