The ornamental design for a waterspeedcontrolvalve, as shown and described.
FIG. 1 is a perspective view of the water speed control valve showing my new design;
FIG. 2 is a perspective view thereof from another angle;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a bottom plan view thereof.
The broken lines in the drawings are included for the purpose of illustrating portions of the water speed control valve and form no part of the claimed design.