Abstract: A spa apparatus including a basin releaseably coupled to a base assembly. The basin and base assembly may be configured for quick coupling and releasing. Coupling the basin and base assembly may simultaneously couple electrical components and/or plumbing components. The basin may be interchanged for aesthetic purposes, because of wear, or for sanitation purposes. The spa apparatus may further comprise a base and a seat moveable by a support structure. The seat may be raised and lowered and/or rotated along an axis. The seat may further be moved fore and aft. A joint may releaseably secure seats having any of a number of configurations to the base assembly, with or without the use of tools, providing for quick and easy replacement of the seat.