Abstract: Apparatus is permanently mounted in the deck adjacent to a swimming pool and connected to the water in the pool to generate a laminar flow of water near the surface of the pool at a rate sufficient for exercise and therapy purposes. Two openings are provided in a wall of the pool, one near the surface and one near the bottom. The openings are connected by a flow conduit which includes an arcuately curved section and a straight section, the latter connected to the upper opening. Diffuser vanes are provided along the flow conduit and in the upper opening. A flow generating means, including a rotating impeller disposed within the flow conduit, draws water in through the lower opening, passes it through the flow conduit and past the diffuser vanes, and discharges it through the upper opening as laminar flow.