A forwardly opening low profile washing machine outlet box configured so that it can be stamped as a unitary piece of sheet metal comprises a back wall having an upper vertical section and a lower downwardly extending forwardly sloping section, a forwardly extending peripheral wall integral with and extending forwardly from a peripheral edge of the back wall, first and second apertures in the upper wall section for mounting first and second valve shanks for receiving first and second water supply lines, and an enlarged aperture in said lower wall section for connecting to a drain line and for receiving a washing machine drain hose.