Abstract: An improved water-wash spray booth of the type in which exhaust air lifts liquid from a reservoir to a trough and such lifted liquid flows from the trough over a floodsheet back to the reservoir. An open top chamber is positioned immediately below the liquid surface within the reservoir and is connected at its bottom to a conduit which discharges into the reservoir at a location spaced from the chamber. A flow of liquid from the trough above the floodsheet induces a turbulent flow of liquid from the surface of the reservoir downwardly through the chamber and out the conduit for breaking up paint particles into smaller particles.