Abstract: A spray assembly for a refrigerated display case has inclined bottom plates defining a first chamber below the bottom plates and a spray chamber above the bottom plates. Pressurized water is delivered into the first chamber through a water pipe having a normally closed control valve connected thereto for pressure delivery of water to a spray support pipe which extends from the first chamber into the spray chamber centrally thereof. A spray pipe is mounted on and communicates with the spray support pipe and has a plurality of opposed rows of water outlets for delivering a pattern of pressurized streams of water onto interior surfaces of the case and the undersurfaces of the grates and tubing of the cooling system for washing them down and for successive disposal through a drain pipe depending from the bottom plates.