Hydraulic power unit designed to be attached to a wall of a swimming pool to generate a current against which the user can swim, exercise, engage in physical therapy, or play

Apparatus for controlling the operation of machines (hydraulic); Control valves being hydraulic apparatus; Hydraulic control devices for machines; Hydraulic control installations; Hydraulic control modules; Hydraulic control systems for machines; Hydraulic controls for machines, motors and engines; Hydraulic cylinders (machines or parts of machines); Hydraulic marine apparatus (other than for land vehicles)

Hydraulic circuits for water vehicles; Hydraulic hose (metal), being parts of vehicle hydraulic systems