Abstract: A device, comprising an extendable object having a retracted position and an extended position with respect to a fixture; and a motive power system adapted for moving the object between the retracted and extended positions. The extendable object is preferably a water fixture amenity, such as a concealable compartment or a raisable seat. Preferably, the motive power system is a hydraulic system and includes a cylinder, a power source, and controls. The cylinder has a piston adapted for moving the compartment with respect to the fixture. The power source is connected to the cylinder and is adapted to extend the piston and move the compartment. The power source includes a water line in fluid communication with a cylinder volume. The controls are adapted for regulating movement of the piston by the power source. A method of moving a water fixture amenity, including the concealable compartment and the raisable seat, generally comprises two steps.