Abstract: A modular walk-in bathtub system may comprise a plurality of configurable components that connect together. The configurable components may enable: passage of the configurable components through various sized doorways; on-site configuration during installation of the walk-in bathtub system to provide a left-hand drain or right-hand drain orientation; on-site configuration during installation of the walk-in bathtub system to provide an in-swing door, an out-swing door or a two-in-one door; removal and reinstallation of the walk-in bathtub system in a different location; and/or stackable storage of the configurable components.