The ornamental design for an adjustable swimmingpoolautomaticshutoff fill valve, as shown and described.
FIG. 1 is an isometric view of an adjustable swimming pool automatic shutoff fill valve, showing my new design thereof;
FIG. 2 is a left side view thereof;
FIG. 3 is a right side view thereof;
FIG. 4 is a back view thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a front view thereof; and,
FIG. 7 is a bottom view thereof.
The broken lines shown in the figures are included for the purpose of illustrating portions of the adjustable swimming pool automatic shutoff fill valve which form no part of the claimed design.