FIG. 1 is a perspective view of a paint spray pump housing of the present invention. FIG. 2 is right hand side view of the present invention. FIG. 3 is a left hand side view of the present invention. FIG. 4 is a front view of the present invention. FIG. 5 is a rear view of the present invention. FIG. 6 is a top view of the present invention; and, FIG. 7 is a bottom view of the present invention.